Why Is My Boat Motor Leaking Gas

If the engine or airbox became soaked with fuel, make sure to check the condition of the air filter and make sure to change your engine oil. Fuel should not leak during normal operation. it runs fine by the way. Interestingly, going better often doesn’t involve extracting more power from the engine. 5 lives in the lazarette and never leaks a drop. It is easy to handle and it cuts through the waves easily. For years, we computed outboard gas consumption easily. PCV SYSTEM SEALS. If it runs then it is your fuel pump, fuel is being supplied by siphoning action if it stops you have an air leak before the check valves in the ball. Otherwise the outboard motor could fall back down suddenly if oil in the power trim and tilt unit or in the power tilt unit loses pressure. The spark plug in your engine might be fouled, corroded or damaged. Tap the exhaust pipe free with a rubber mallet when unbolted. If leaving the gas cap off for 5 to 7 minutes does not solve the problem then go to the next step. This was very unusual because that is a great motor, and it has always started on the first or second pull since I bought it 3 years ago. com carries marine propellers designed for Mercury, Yamaha, Evinrude, Johnson, Honda, Suzuki, Tohatsu, Mariner, Force, Nissan, and Chrysler outboard motors. So, why is my air conditioner so loud? The answer to a noisy air conditioner just isn’t that simple. They quickly asked to sit down, and to make a long story short, there were factors beyond the engine that may have caused or at least been attributed to the failures. Similarly, accounts of cracked or corroded pipes throughout fuel systems are commonplace. Another common symptom to look out for is a power steering noise. Experience the reliability of a trusted brand and the accessibility of our affordable lineup of boats. That's why you see a sheen of oil around any two-stroke boat motor. When I pour gas in the fuel bowl in order to test the pump, all the fuel leaks out the bottom. If you find a leak in the steering gear, rack, or power steering pump, use BlueDevil Power Steering Stop Leak to seal the leak. ) Anywere else before it gets to the cylinders and it should end-up in. It has a 2 stroke oil injected 50hp Johnson motor. Now it seems to leak when standing straight up. Why doesn’t the oil get hot enough to steam it off? A. Remove the fuel line from the inlet fitting of carburetor. I began noticing trouble with Duracells some years ago about the time Ken mentioned having trouble with them too on this website. For example, the SD365 can take up to a 30 HP outboard motor, but a 9HP or 15 HP motor will move this boat very nicely with 2-3 people on board. Fuel * If your fuel is more than a few weeks old, then, replace it with fresh fuel. It would be helpful if you can pinpoint it yourself. This ratio means that there is too much air in your engine, and as a result, the engine will run poorly or not at all. when you say leaks fuel/oil just how much are we talking about?,,,as the reads in a motor age it is common for them to not seal perfectly,,and then the pressure from the crank case will give you a slight bit of blow back out the intake,,along with the blowback you get atomized fuel that collects in the air box,,,that's why they put the recovery hose on the air box,,,also it is not uncommon for. Fuel delivery system test - basically, you are checking to make certain the fuel delivery system is delivering fuel to the carburetor. Remove the primer bulb retaining ring and replace the primer bulb. Alright, well I hope you enjoyed that video. Increased Engine Noise. The latest outboard motor oil engine models are environmentally friendly with long lifespans and decreased emissions. When you hear the motor come off idle, and rev up slightly, you have got your leak. Find the area where the tank is leaking or where there is an obvious small hole where the gasoline drips or leaks out. Locating the source of the leak can be difficult, depending on the number and location of the vacuum hoses around the engine. Synthetic Motor Oil Myths. are in the early dodge rearend has been shorten so the big rear tires fit in the fenders. It is the job of the fuel lines to bring fuel from the gas tank to the engine. Then that night i looked at the engine and I could see black oil leaking from the back of the prop where it is attached to the shaft. ” Fuel injectors will fail when debris (water, dirt particles, etc. My Dad has a 1958-59 5 1/2 hp Johnson Sea Horse outboard that runs perfectly. The engine block performs a number of functions, including assisting with the pumping of water from the radiator to the different parts of the engine to cool them down; housing pistons in several cylinders that move the vehicle’s crankshaft; sealing in the lubricating oil via the oil pan attached to the bottom, and acting as the housing for. If you want more than that, go for either the Merc or Volvo 8. If you find leaks, consult your safe boating mechanic. The STFT will start to climb immediately to reflect the computer adding fuel. ) If front or rear engine-bearing seals leak, add a can of "Bearing Seal Additive" after Step #2. com supplies high quality auto parts, gas tanks, gas tank accessories, restoration fan belts, fuel lines, sending units, radiators, oil pans and break components shipped direct to your door as fast as you need them. com carries marine propellers designed for Mercury, Yamaha, Evinrude, Johnson, Honda, Suzuki, Tohatsu, Mariner, Force, Nissan, and Chrysler outboard motors. Experience the reliability of a trusted brand and the accessibility of our affordable lineup of boats. Step 3 - Sand the Leaky Area of the Tank. The fuel pump check valve or the fuel return regulator leaking allows the fuel to drain back to the gas tank depressurizing the fuel rail. My old car is working quiet and it is saving gas, I don't know the exact quantity but I know that I am saving money in gas. Over time, the rubber of the primer bulb can become brittle and cracked, causing the bulb to leak gas. About 8 months later the one was loose and leaked. Sometimes the hole in the freeze plug is very small, and can periodically stop when a piece of crud from the cooling system jams in the hole. When I squeeze the fuel ball I can see fuel coming out inside the motor housing and running down to the bottom of the motor. The most common cause of an EVAP leak warning, or the Check Engine Light, is the gas cap not being. You need to isolate the leak, and seal it. Try removing your EGR at some roadside gas station. If you experience hard starts especially restarting a short period after shutting off the engine, then one possibility is a leaking fuel system. It was better, but still had some problems with it dying. Skip navigation The Most Common Outboard Engine Issues: Fuel Systems and Flushing - Duration: 2:25. I bought the Etec 90 new in 2016 off a reference of a boat mechanic (not an Evinrude dealer) that he thought the 90 would be the right engine for my boat. Answer: Besides your engine not running or running poorly, a periodic visual check of the fuel water separator on you engine is the best way to see if water is beginning to accumulate in your fuel system. When the flame burns the soot, the resulting incandescence is orange. Some trips the motor would run fine and the net time out you would have to pump the fuel bulb constantly to keep it running. While many newer lawnmower models eschew the primer bulb in favor of a simpler starter lever, older models often use the primer bulb as part of the. Sorry Brushcreek, I wasn't very clear. A worn or clogged pump can also make an engine hard to start. Great for aluminum fishing boats, inflatables, sailboats, or as a kicker, the 15hp and 20hp engines are reliable compact outboard motors. I want to take necessary precaution to avoid any water leaks, flooding, mold, or fires. 7 or about 88. Check for missing gasket, or damage. Turn the engine off and confirm the fuel is still leaking from the exhaust. What type of oil should I use in my Suzuki outboard? We suggest that customers use genuine Suzuki 4 Cycle Engine Oil. In this case, the oil was at the top mark of the dipstick. Used (normal wear), I’m trying to sell my 16” LOAND BOAT Fishing good condition for 5 people’s and capacity for1150 lbs,the boat has a small leak and has a pump for draining the weather ,if you have any cuestión feel free to send me a msg, come w/ electric motor 50 lbs and a gas Suzuki 30. One frequently misdiagnosed problem first occurred in many early-’80s and ’90s vehicles and resulted from a leak in the hose connecting the fuel pump outlet to the sending unit inlet. As the engine comes to life, the crew person immediately primes the injector with additional gas. Yes I think a carburetor kit my rectify your fuel leak problem, there are four possible reasons why the carb is leaking. Because this engine is dependent on proper oil pressure to make the fuel injectors work, it is a must that the technician start by checking the engine oil level. The black specs in the picture are charcoal pellets that came from the charcoal canister. Tightening jet the fell out helped. Make sure vacuum and fuel lines to fuel pump are secured and in good condition. 0L motor it can also be a sign of a bad EGR cooler. To be a driver. About 8 months later the one was loose and leaked. Some smoke came out when i first started it and everything was ok. One of my friends said it might be the piston rings. That could be due to the fuel tank not venting properly and eventually building up pressure in the fuel line going to the engine. If you notice either of these issues, you have a potential leak in your exhaust system. We were using the boat yesterday and the engine just started revving uncontrollably. Primer ball doesnt really stay hard during normal running ,the only reason it gets hard when you "pump" is the fuel system in the motor is full the float comes up and seals the needle valve. Fuel volume. The fuel tank is so far away from the engine that the stock BB Chevy fuel pump can't pull it far enough so it has an electric back by the tank. Based on the experience I do have, it shouldn't do this, but this outboard is older than the ones I usually work on and I don't need to use a primer bulb on my '56 Chev. 05001F-031223 Not rated yet Leaking fuel somewhere round the engine I have just replaced the high pressure fuel pump and re installed everything but when I start up the outboard there's … Suzuki DF90,2004. The other was a '90 or '91 350 Chevrolet marine engine (in a boat, of course). It was hard to diagnose because once everything cooled down, it would start and run fine. 4 Common Reasons Why Your Engine May Be Idling Rough 1. There is variety of such devices that can be mounted in all such places that are prone to leakage and accumulation of any type of gas, due to the fact that it will help protecting against the feared accidents triggered because of gases. The wrong orifice may be installed for the type of gas you are using; liquid propane and natural gas do not have the same air-to-fuel requirements. The float needle valve is responsible for regulating the flow of fuel into the float bowl. As reported by our customers, even with a 15 HP outboard motor and 2 people this boat can plane nice and easy. So I assume they were leaking. Perfect article for what I need to do on my smaller riding mower. If leaving the gas cap off for 5 to 7 minutes does not solve the problem then go to the next step. After the engine warms up, sometimes they will run, but only after a hard start. This is partially due to PCV flow, but can also be an indication of a leaking fuel pressure regulator (arrow). Lawn mower leaking gas from the primer bulb? The primer bulb is perished and has split, mice like to eat them also. The engine then ran fine the remainder of the day (but we stayed at the pile and never went faster than 5 miles an hour. but it cant be gas leaking into the engine and thru the exhaust when not running. We use cookies to give you the best experience and to help improve our website. Once this happens, your engine will eventually overheat. The primer bulb may be leaking. 5 lives in the lazarette and never leaks a drop. (Same as the filler-neck. According to eHow, fuel lines can develop leaks over time because they are prone to rub against metal under your vehicle. The degree to which this happens depends on the particular engine, the carburetors, and the orientation. When this occurs, there’s a constant fluctuation in the amount of fuel that’s pumped to the boat’s carburetors, and as a result, the motor’s RPMs go up and down. The most common reason oil is leaking from a lawn mower air filter is too much oil in the engine, but it can also happen when the mower has been on its side. After you refill the system, if the ram works but won’t hold the motor up, you likely have a major leak or a bad check valve and need to get your motor to a Yamaha Certified Mechanic immediately. Welcome to your National Supply Direct! My Account. If there’s fuel laying in the intake or if the area around the regulator is very clean, the regulator diaphragm is probably leaking. It is very possible that my boat was very underpowered to begin with. Gummy deposits and varnish can plug passages in the carburetor preventing the engine from running or causing the engine to run poorly (surging, lack of power, stalls, etc. Easily find a replacement boat propeller for your outboard, sterndrive or outdrive. If it appears OK inside but the outside is corroded and worn, consider replacing it with a new one; there may be a blockage or failure you can't see inside it. Oil Hose Connections. The ignition timing may be set wrong. Percentages may not add up to 100% due to independent rounding. Dispose of the Fuel This is the easy part. With gas prices as they are, the biggest risk is dribbling out nickels and dimes all over town. The gas is suspended in the air so it can move to where it is needed. If the tanks leaks, gas and oil will escape into your boat and into the air. It reduces friction, lessens wear, lubricates metal engine parts, forms a seal between the pistons, rings and cylinder walls while helping to cool engine parts. Offered in 1/4" NPT or 3/8" NPT sizes. A small amount of fuel spilled when an engine is tilted to the full up position is fairly normal for certain engines. Fuel System vapor lock can be caused by several things including a bad Fuel Pressure Regulator (FPR), bad fuel pump check valve, or leaking injectors. It was just leaking fuel and oil after the engine had been run and tilted forward for like ready to tow. 5 feet fromthe tank, and all that I have in line (in order) are: 1) tank, 2) fuel shutoff valve,. They quickly asked to sit down, and to make a long story short, there were factors beyond the engine that may have caused or at least been attributed to the failures. ) If front or rear engine-bearing seals leak, add a can of "Bearing Seal Additive" after Step #2. A clogged fuel line inhibits the flow of fuel from the boat's gas tank to the engine. 5 lives in the lazarette and never leaks a drop. Low Fuel pressure is where most problems occur for fuel supply. Never try to get a better time at the drag strip by running with cold engine oil and never try to warm a car up by reving the engine. However, if the fuel filter becomes damaged or dirty, it can result in a clogged fuel line, causing a lean mixture and stalling under. 00 Each AOMCI Members call for discount. Decreased power and efficiency: Engine performance issues, like decreased power during acceleration or fuel efficiency, are another important indicator. Alarm for as much as my pea brain knows on a 2 stroke is overtemp. The fuel inlet needle in the carburetor is stuck open allowing fuel to flow freely into the engine causing your issue. The engine # is 1B452160. “That’s why a lot of truck owners swear by using premium fuel, low quality or contaminated fuels can corrode and rust the fuel system, which can cause major problems down the road. I began noticing trouble with Duracells some years ago about the time Ken mentioned having trouble with them too on this website. Most injuries or property damage can be prevented if you follow all instructions in this manual and on the outboard motor. The boat designer often calls for an engine room ventilation system to match the original engine, but after a re-power the old ventilation system may no longer be sufficient. Tap the exhaust pipe free with a rubber mallet when unbolted. In old engines that blowby simply vented into the atmosphere via a tube called a crankcase vent tube. net 608-783-2626 bruce. I didn't know what it was at the time I thought it was some kind of gluey nasty buildup. Brass fuel selector valve for dual tank fuel lines. Does this motor have enough antique value that we should sell it to one of you collectors, or should we just sell it with the old fishing boat it is on? Thanks. A clogged fuel line inhibits the flow of fuel from the boat's gas tank to the engine. Over time, the power tilt and trim motors can experience corrosion, especially if you run your boat in saltwater. Fuel filters help reduce this problem by filtering particles from the fuel before they can reach small, easy-to-clog lines. Many homes use natural gas for heat, hot water, and home appliances. Kohler Engines manufactures riding lawn mower and garden tractor engines. The only way water could get into tank is if the fuel sending unit started leaking. Don’t worry. Imagine yourself out on a quiet lake, enjoying the tranquility, while still making good headway thanks to the virtually silent electric motor pushing your boat across the water. GM spent over $12,000. Find the area where the tank is leaking or where there is an obvious small hole where the gasoline drips or leaks out. Use it to repair pinholes, rust-outs, hairline cracks and holes up to 1/2" in diameter. Just wonderin. The engine may be running too hot. Check for trouble codes in your car to diagnose a faulty fuel system. QUICK FIX: First, squeeze the ball as you watch the fitting between the engine and the line, the barb and the hose, the barb on either end of the ball, and if it's visible, the fitting between the line and the tank. My engine started this morning while cold. Step 2: Clean out the gas can of old gas and oil mixture because it may be water contaminated. If even the smallest amount of these residuals adheres to the fuel injectors, bad things will happen. ” Fuel injectors will fail when debris (water, dirt particles, etc. One of my friends said it might be the piston rings. I almost lost my current engine from a hit that took out three of the four mounts so heads up and replace em. The engine block performs a number of functions, including assisting with the pumping of water from the radiator to the different parts of the engine to cool them down; housing pistons in several cylinders that move the vehicle’s crankshaft; sealing in the lubricating oil via the oil pan attached to the bottom, and acting as the housing for. In my world where each one of my Mercury Outboard Engines gets an oil change and filter once a month the improvements I see in this Mercury Outboard would cut considerable time out of the process. Once you’ve fixed the problems, make Gumout part of a regular maintenance schedule so these issues don’t return. Leaving a tank near empty for long periods of time can cause condensation and water in the gas. These state-of-the-art technologies place a lot of pressure on the engine’s lubricants, hence making it critical to select the right oil and fuel for your boat’s engine. 99% of the exhaust comes out of the prop, not the hole below the coweling. If you notice either of these issues, you have a potential leak in your exhaust system. It has been stood upright empty all winter and now, with about 1 litre of fuel in it, it leaks all over the place when tilted towards the end with the controls. If so, make sure to run the boat long enough to get the. Kohler Engines manufactures riding lawn mower and garden tractor engines. I will be changing the oil in my 06 Winnie with 8. One frequently misdiagnosed problem first occurred in many early-’80s and ’90s vehicles and resulted from a leak in the hose connecting the fuel pump outlet to the sending unit inlet. Fuel Injected and Newer Engines. If there’s fuel laying in the intake or if the area around the regulator is very clean, the regulator diaphragm is probably leaking. Regardless of your boat’s throttle setting, the presence of an air leak will greatly restrict its. 7 or about 88. ) or rust find their way into the system and, after time, plug up the nozzle, the armature. Low fuel volume or pressure due to feed or supply pump, main pump, high-pressure GDI pump faults. Based on the experience I do have, it shouldn't do this, but this outboard is older than the ones I usually work on and I don't need to use a primer bulb on my '56 Chev. The brand of the gas and the oil as well as air density can affect how well the mixture works. The carburetor must be removed ,disassembled, cleaned and have a carb kit installed. The car was just sitting and I started smell fuel and I went out to the garage and found fuel poring out of the hole. Fuel needs to be under high pressure and atomized properly to provide optimal combustion. It has 5w-30 Valvoline conventional oil in it now, but was thinking for this oil change and future changes to use 5w-30 Valvoline Synpower Full Synthetic 5w-30. There are several ways to check this. The sound lasts for about 2-5 minutes and when it ends, it sounds like a motorboat engine getting turned off. They are pretty simple engines, and few things can go wrong for well-cared-for motors. The OPTIMAX is the most MIS-DIAGNOSED engine out there. Good Sam Club , Good Sam Insurance Agency , Good Sam Life Insurance Central , Coast Resorts , Good Sam Life & Health , Good Sam TravelAssist , Good Sam Roadside Assistance , Good Sam Extended Service Plan , RV Loans , MotorHome , Rv. If you have white smoke coming from the tailpipe, it can be a sign of a blown head gasket. A 20 ph would burn _____ gallons per hour. How to fix a flooded inboard boat engine. 00 shipping. Make sure the fuel valve is open. I have no idea. I use "Fuel Doctor" in all my engines and notice a huge difference. plug looks good. INJECTOR SEALS There are seals around your fuel injectors: they can leak vacuum or leak fuel PCV System Seals. Managed to shut it down and drifted for a while. Performing a compression test on an outboard engine is fairly simple. Advanced Range Optimization (ARO) calibration precisely adjusts the fuel mixture and delivers the best possible efficiency at any speed. If your vehicle has an engine vacuum leak, the air-fuel ratio in your engine will be higher than 14. When the flame burns the soot, the resulting incandescence is orange. Another common symptom to look out for is a power steering noise. After the engine warms up, sometimes they will run, but only after a hard start. There are two faults that could be causing this, diesel injectors or diesel injector rail not holding the fuel within the system and poor fuel supply to the diesel injectors or diesel injector rail. QUICK FIX: First, squeeze the ball as you watch the fitting between the engine and the line, the barb and the hose, the barb on either end of the ball, and if it's visible, the fitting between the line and the tank. Make sure that the gas line which goes from the bottom of the gas tank to the side of the carburetor is not split. Deposits can also cause the carburetor to leak fuel if they prevent the float needle from sealing properly. Try locating the tank above the motor while it is in a stand with a flusher attached. It is true that synthetic oil is thinner than conventional oil and therefore flows more easily. ) Leaking fuel tank. First, check for and correct any oil leaks around valve covers and oil pan. I had a 1988 2. The only way water could get into tank is if the fuel sending unit started leaking. My question is why is it leaking alot of gas from that line??? Do I need to re-route the vent line or something? NOTE: It stopped leaking last night, but this morning I discovered more gas leaked out overnight. Mechanics stress that fuel. I will be changing the oil in my 06 Winnie with 8. Never try to get a better time at the drag strip by running with cold engine oil and never try to warm a car up by reving the engine. Performing a compression test on an outboard engine is fairly simple. I really don't have no idea what could be causing it to do this and any help would be appreciated. Obviously this method doesn’t work if your leak is causing your motor idle to really high, or your motor to idle erratically. When I pour gas in the fuel bowl in order to test the pump, all the fuel leaks out the bottom. It is a Model 927046- RM1028. This oil is controlled from leaking out of main engine parts by using a series of covers, gaskets and seals. Bad valve stem seals will cause oil smoking on engine startup which goes away after running for awhile. My theory was that this occurred because the engine was hot after the one-hour run down to the rock pile, and the heat was affecting the mechanical fuel pump(low pressure pump). In old engines that blowby simply vented into the atmosphere via a tube called a crankcase vent tube. How To Correctly Compression Test an Outboard Engine. when you say leaks fuel/oil just how much are we talking about?,,,as the reads in a motor age it is common for them to not seal perfectly,,and then the pressure from the crank case will give you a slight bit of blow back out the intake,,along with the blowback you get atomized fuel that collects in the air box,,,that's why they put the recovery hose on the air box,,,also it is not uncommon for. A more common condition would be a rich condition in all cylinders caused by a dead oxygen sensor or coolant sensor that prevents the computer from going into closed loop, or a faulty fuel pressure regulator that feeds too much pressure to. Motor runs but can’t get the pop pop noise to go away. If your OEM equipment has seen better days, contact Wholesale Marine to inspect our selection of permanent fuel tanks for sale. Don’t worry. After that I disconnected from the motor and let it hang in the motor well. In 4-stroke engines, the lubricating oil is in the crankcase. I changed the 43# trolling motor to the. Leaky tanks also lose needed pressure to deliver fuel up the long hose back to the motor. Got up to anchor after 4 hours at running 9mph and found paint in the regulator. A carburetor floods fuel out because the needle float valve not seating correctly to the needle valve seat. Gas detectors assist in spotting the harmful and flammable gases in the restricted areas at residential and also commercial set up. Hesitation can come from accelerator problems but it also may be symptomatic of an. A fuel line could have a hole in it and leaking fuel into the bilge. One of the most common exhaust problems is a rattling sound. Check for a split gas line. ) or rust find their way into the system and, after time, plug up the nozzle, the armature. I didn’t know what it was at the time I thought it was some kind of gluey nasty buildup. Why doesn’t the oil get hot enough to steam it off? A. It is the job of the fuel lines to bring fuel from the gas tank to the engine. A crankcase air leak is a problem many pro saw engines have at some point in their life. All had that Mikuni carb. 402 big block motor and 4 speed saganal trans. Ease of Use Prop Selection Tool. The most common hazards are discussed in this chapter,. Offering the best selection of boats to choose from. Didn't want to bother repairing it and have a leak down the road so I decided to replace it. Perfect article for what I need to do on my smaller riding mower. Sail Pro Model! Designed specifically for sail boaters. This was very unusual because that is a great motor, and it has always started on the first or second pull since I bought it 3 years ago. tank at the rear port side corner and the boat always listed to that side. This is due to a loss of backpressure from the leak. A crankcase air leak is a problem many pro saw engines have at some point in their life. probably no gas there because if it was filled would not run good,probably not at all. Given enough time the gummy deposits will become a hard varnish. When the car is warm, the fuel remaining in the fuel rail can flash causing vapor lock. Then that night i looked at the engine and I could see black oil leaking from the back of the prop where it is attached to the shaft. Often times the fuel lines running to the injector will be the cause because they no longer seal properly, so this article will give you the tools the fix this malfunction yourself. Contaminated Fuel Years ago we had serious fuel contamination problems due to underground steel storage tanks that rusted and leaked. Fuel System vapor lock can be caused by several things including a bad Fuel Pressure Regulator (FPR), bad fuel pump check valve, or leaking injectors. My gas cap doesn't have a vented cap, it is vented by hose up to side wall of fencing. In this image released by the U. Hi, Steve here. If even the smallest amount of these residuals adheres to the fuel injectors, bad things will happen. (Same as the filler-neck. Any gas coming out of this hole indicates a bad power valve, or the power valve gasket is damaged. One of the more common questions we get concerns either the overwhelming smell of gas coming from the carburetor or fuel leaking out of the bowl or overflow. Most motor manuals include a section on troubleshooting. (Would most-likely end-up in the bilge or on the floor of the boat. This disrupts the operation of the fuel pump, causing loss of feed pressure to the carburetor or fuel injection system, resulting in transient loss of power or complete stalling. Johnson, now Johnson/Evinrude, is synonymous with boats and boating. When you mix the fuel and oil, you must do so with the proper ratio. My initial assumptions were correct. The exhaust pipe leads down from the engines exhaust elbow to the inner transom. It allows you to easily find parts such as: cooling, electrical, starters, fuel system, gaskets, ignition, o-rings, power trim, and seals. It reduces friction, lessens wear, lubricates metal engine parts, forms a seal between the pistons, rings and cylinder walls while helping to cool engine parts. The easiest method to test for sufficient air flow is to use a manometer and measure engine compartment pressure. Car dies at lights when I try to go mainly if the engine is cold once its hot no stalling or lagging whatsoever. Boats leak, and stuff located under those leaks are going to get wet. Mechanics stress that fuel. Boat and Motor Superstores is a marine dealership located in Palm Harbor, FL. Quality reproductions. The injection pump itself is usually not the source of the air leak, so check the fuel lines and pump. Every fuel hose that connects an external gas tank to an outboard engine has an arrow printed on its hand pump (that small bladder that contains a check valve and sends fuel from tank to engine with a few squeezes). Contaminated Fuel Years ago we had serious fuel contamination problems due to underground steel storage tanks that rusted and leaked. Somewhere between the engine and the fuel tank. If not, install new gaskets or have the work done. I just bought a force motor 1990 model 125 horsepower. A consumer may think that there is a problem with the ignition, but an engine vacuum leak is something a little bit more. This compression ratio means that the outboard is designed to compress the fuel/air mixture at 6 times atmospheric pressure. Search: Search. Normal operational height of fuel in the carb is below MAX fuel level ,thus soft ball. If it's low you'll want to do a good inspection to check for any leaks. The very thing that this demand valve is suppose to correct (not let fuel vapors leak out) allowed quite a bit of fuel leak out into my boat and hence gasoline vapors went all over the place. Many people mount various types of pumps low in the bilge, assuming that the bilge water is never going to rise. So you should look for loose intake manifold bolts, leaks in the carburetor mounting, faulty gaskets and leaks in the crank seals. My old car is working quiet and it is saving gas, I don't know the exact quantity but I know that I am saving money in gas. The fuel could evaporate too much that it would create too much vapor and would eventually inflict the engine. It would be helpful if you can pinpoint it yourself. I didn’t know what it was at the time I thought it was some kind of gluey nasty buildup. The fuel shut-off valve isn’t closed properly. Leaking filler-neck. Feel free to contact our technical support line at 888-863-0426 with any other questions. COM — Most exhaust problems can be diagnosed by paying attention to unfamiliar sounds or taking a look underneath the car. Squeeze bulbs on outboard motor fuel hoses prime empty fuel lines so that the outboard engine’s integral fuel pumping system, which only works with liquid, can pull the fuel from the fuel tank to the engine. After I ran it, and it sat for a while I noticed oil leaking from the prop. I checked everything I could think of ,o-rings, checkvalve, fuel pump, hose clamps, gaskets everything to do with the fuel delivery system. the carb does need a rebuild i do know but i can fire it up and it with high idle for 2. It means that the needle valve in the fuel bowel is stuck in the open position. The lines were full of that lining. Brass fuel selector valve for dual tank fuel lines. Not all engines require the same ratio. My fuel line is leaking fuel at the motor connection. I began noticing trouble with Duracells some years ago about the time Ken mentioned having trouble with them too on this website. Does this motor have enough antique value that we should sell it to one of you collectors, or should we just sell it with the old fishing boat it is on? Thanks. Crawl under the vehicle and inspect the gas tank. Find the area where the tank is leaking or where there is an obvious small hole where the gasoline drips or leaks out. My Dad has a 1958-59 5 1/2 hp Johnson Sea Horse outboard that runs perfectly. The 2017 C-Class is offered in several trims: C300, C300d diesel, C350e plug-in hybrid, C450 AMG Sport, AMG C63 and AMG C63 S. While many newer lawnmower models eschew the primer bulb in favor of a simpler starter lever, older models often use the primer bulb as part of the. Take the cowel off, start the engine & look real close at all the hoses & connections & see if you can see or feel any fuel dripping down it's leg. Fuel filters help reduce this problem by filtering particles from the fuel before they can reach small, easy-to-clog lines. GM spent over $12,000. The internal fuel tank model even includes a built-in external fuel connector so you can easily add an optional separate fuel tank. P1134 Bank 1 Fuel Control Shifted Rich - Read Our Article on Oxygen Sensor Codes For Help With This Mercury Check Engine Light Code P1135 Pedal Position Sensor A Circuit Intermittent P1137 Lack of Downstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank 1 - Read Our Article on Oxygen Sensor Codes For Help With This Mercury Check. They are pretty simple engines, and few things can go wrong for well-cared-for motors. I do have a fuel leak around the fuel intake flange on the injector pump. Skip navigation The Most Common Outboard Engine Issues: Fuel Systems and Flushing - Duration: 2:25. Listen to the engine for any odd sounds. Fuel Injected and Newer Engines. The fuel lines are just one element in a vehicle’s intricate fuel system. My theory was that this occurred because the engine was hot after the one-hour run down to the rock pile, and the heat was affecting the mechanical fuel pump(low pressure pump). Priming boats aren't restricted to boat motors; they can be found on lawnmowers, weedeaters, leafblowers, and pretty much any other type of gas-powered motor. Increase the fuel flow and the engine should run. Most vehicles have a maze of hoses throughout which create a vacuum for both fuel and air. Air to the engine: The carburetor must be getting its full quota of cool air. The answer to a noisy air conditioner just isn’t that simple. But everyone has an occasional snafu that requires some troubleshooting. My outboard had been sitting forlornly in the garage among a pile of ropes, fenders and sails since it came ashore at the end of last summer. The Canadian government has handed out $68. When I squeeze the fuel ball I can see fuel coming out inside the motor housing and running down to the bottom of the motor. Use the sandpaper to sand the area where the tank is leaking. Introduced in 1976 models, it had a displacement of 305 cu in (5. i realized that the little metal piece that holds them down, was on upside down. Anytime you have a problem with an outboard, always check the owner’s manual for tips and tricks. If the tanks leaks, gas and oil will escape into your boat and into the air. Advertisement. Steve La Liberte [email protected] Imagine boating without trips to the marina for increasingly expensive fuel, without lugging gas cans (and oil) to the boat, without cantankerous, hard-to-start engines. If you are getting water, it is getting there some other way. 200,000 miles on an average modern-day Japanese engine turning a 3,000-rpm average at a 32-mph. Our products are designed to fix engine problems like hesitation, rough idle, poor gas mileage and loss of power. The problem is to identify the reason the fuel flow is low. How to tell if there is a gas leak. The primer bulb may be leaking. Wipe everything down and spray with an anti-corrosive like WD 40 or Quick-lube. Synthetic Motor Oil Myths. Advanced Range Optimization (ARO) calibration precisely adjusts the fuel mixture and delivers the best possible efficiency at any speed. When the engine is running it is circulating the fuel through the fuel galleys in the heads at a pressure above 65 psi and the excess fuel will return back to the tank via the return line. Gas will get into the crankcase when you have a carburetor that is leaking past the needle. In the real world, this means when you're driving down the highway and the engine is plenty warm and the airflow through the engine bay is taking warm air from the engine bay out through the bottom of the car. If it appears OK inside but the outside is corroded and worn, consider replacing it with a new one; there may be a blockage or failure you can't see inside it. If the leak persists, the connection fitting is probably bad and it may be time to replace the fuel line. OUTBOARD MOTOR INSTALLATION 90-859494R1 JUNE 2000 Page 1D-9 Fuel Hose Connection Fuel Hose Size – Minimum fuel line inside diameter (I. My initial assumptions were correct. The Life Expectancy of the Marine Engine The average marine gasoline engine runs for 1,500 hours before needing a major overhaul. Primer ball doesnt really stay hard during normal running ,the only reason it gets hard when you "pump" is the fuel system in the motor is full the float comes up and seals the needle valve. Check the operation of fuel pump. A loose fuel line connection is easy to correct by tightening the connection at the carburetor. My friends 2002 4 stroke honda 50hp outboard has failed. Some trips the motor would run fine and the net time out you would have to pump the fuel bulb constantly to keep it running. sending unit filter can clog in the tank, (B) a fuel line may be filled with dirt-daubers, (C) a fuel line fitting may have cracked, allowing air to enter the system. Now it seems to leak when standing straight up. This is why boats have blowers and you are supposed to sniff for gas first. Tap the exhaust pipe free with a rubber mallet when unbolted. These fuel types include Direct Fuel Injection and Electronic Fuel Injection. Priming boats aren't restricted to boat motors; they can be found on lawnmowers, weedeaters, leafblowers, and pretty much any other type of gas-powered motor. With gas prices as they are, the biggest risk is dribbling out nickels and dimes all over town. They are pretty simple engines, and few things can go wrong for well-cared-for motors. Not all engines require the same ratio. With the engine idling, take your can and spray down the vacuum lines and listen for the engine’s idle to change. The latest outboard motor oil engine models are environmentally friendly with long lifespans and decreased emissions. I pumped the primer ball a couple times and found my leak. But don’t get me wrong. Fuel Line Leak: Symptoms and Detection. Make sure that the gas line which goes from the bottom of the gas tank to the side of the carburetor is not split. Dispose of the Fuel This is the easy part. Idle speed that is way too fast is one of the difficulties, and stalling is another. That's why you see a sheen of oil around any two-stroke boat motor. One of the most common exhaust problems is a rattling sound. I hooked up the water and gas and I ran it in my driveway for 10-15 min to get the fog out because it hasnt been in the water since it was winterized. We feel our oil is the best available on the market today. Rather, the winning formula is one of achieving reliability & reducing drag through the water. Our oils are formulated to provide superior lubrication and protection for internal engine parts in the harsh marine environment. Please enter an answer in digits:. Compressed fuel and air mixture burns in the cylinder on the top of the pistons. The gas is suspended in the air so it can move to where it is needed. Outboard engines lose fuel prime because of an air leak in the fuel system. When you mix the fuel and oil, you must do so with the proper ratio. Percentages may not add up to 100% due to independent rounding. You may not even see any visible leaks coming from your vehicle on the outside. However, to put the boat on plane with a full load of 5 people and gear, a 30 HP motor may be required. Air in the fuel also causes similar problems – this can enter the fuel system through two mechanisms, running out of fuel, or leaks on the suction side of the fuel pump, which will draw air into the fuel lines. For my problem, I would start the engine and everything would run fine until it got warm after 10-15 minutes then the engine would slowly die as it was getting starved of fuel. Fuel volume. A new Top Cowl Service Door on Verado motors provides easy engine-oil checks and fills. Most modern engines have them installed, and some of the more sophisticated units even have wired electrodes that will sound an alarm when water gets to a certain level in the canister. Without this thin layer of oil, the engine compression would be allowed to escape into the crankcase. Hi, Steve here. When you pump gas the motor or crank the motor, Gas will pour out of the upper carb. it runs fine by the way. I did not mean that your oil to gas mixture was too rich as in a two cycle engine, mixing the oil into the gas etc. It usually sounds something like this: "I have a 1997 XYZ two-stroke, 40-horsepower outboard. Use the sandpaper to sand the area where the tank is leaking. I began noticing trouble with Duracells some years ago about the time Ken mentioned having trouble with them too on this website. This powerful sailboat engine, available in a "long" and an "ultra-long" shaft, has a high thrust sail drive propeller to give you the power you need. One of the most common exhaust problems is a rattling sound. The OPTIMAX is the most MIS-DIAGNOSED engine out there. Based on where you find the oil leak, there are various steps necessary to successfully repair it. Injectors need to supply the right amount of fuel under operating pressure. Find new or used boats for sale in your area & across the world on YachtWorld. This Predator 670cc V-twin 4-stroke gasoline engine delivers more power in less space than similar displacement standard twins. Fuel should not leak during normal operation. It has 5w-30 Valvoline conventional oil in it now, but was thinking for this oil change and future changes to use 5w-30 Valvoline Synpower Full Synthetic 5w-30. I cleaned the carbs, changed the spark plugs and gave it fresh gas. 5 1/2" x 1 1/8" Metal plate, for early models. The lines were full of that lining. But boats that are run at non-planing speeds may not heat the oil up very much at all. Priming boats aren't restricted to boat motors; they can be found on lawnmowers, weedeaters, leafblowers, and pretty much any other type of gas-powered motor. If a high-pressure fuel line is leaking, it may be spraying a fine mist of diesel into the air and this could cause a fire. You should allow the engine to burn the small amount of fuel that is in the carburetor. Another cause of a gas leak is a sticking float inside the carburetor bowl. my dealer and the subsidiary company of OMC that made my boat (SeaSwirl). There are several ways to check this. Sal: Al_A_Buy. The pilot fuel screw meters fuel, so turning it clockwise/in will lean the fuel/air mix, while turning it counter-clockwise/out will richen the fuel air mix. If not, install new gaskets or have the work done. While there is a mountain of info to learn about the various oil choices. Once you've finished the flushing and run the engine out of fuel, be sure to turn off the key and, if you have a battery switch, turn it off. Fuel filters help reduce this problem by filtering particles from the fuel before they can reach small, easy-to-clog lines. There could be a leak from the fuel sender or pick-ups on the fuel tank which are leaking fuel when the tank is full. 5 lives in the lazarette and never leaks a drop. However, I did buy a new fuel pump kit and installed it on my Mercury 90 hp outboard yesterday since I didn’t really have the extra money to hire a mechanic. Without this thin layer of oil, the engine compression would be allowed to escape into the crankcase. Boats leak, and stuff located under those leaks are going to get wet. I'm not sure why there isn't a recall on it when apparently these cars are notorious for these issues. A 20 ph would burn _____ gallons per hour. Check the following: Make sure the vent in fuel tank is open. (8mm), with separate fuel line/fuel tank pickup for each engine. 0L motor it can also be a sign of a bad EGR cooler. Tightening jet the fell out helped. Leaving a tank near empty for long periods of time can cause condensation and water in the gas. There are two faults that could be causing this, diesel injectors or diesel injector rail not holding the fuel within the system and poor fuel supply to the diesel injectors or diesel injector rail. The pilot fuel screw meters fuel, so turning it clockwise/in will lean the fuel/air mix, while turning it counter-clockwise/out will richen the fuel air mix. * Land Use, Land-Use Change, and Forestry in the United States is a net sink and offsets approximately 12 percent of these greenhouse gas emissions, this emissions offset is not included in total above. Whether it’s a boat for watersports, a roomy deck boat for the whole family, a stable platform for fishing, or an open-bow boat for a weekend cruise, there’s no better choice than Bayliner. The injection pump itself is usually not the source of the air leak, so check the fuel lines and pump. I took off the carb and look at the values and none seemed to be broke. Squeeze bulbs on outboard motor fuel hoses prime empty fuel lines so that the outboard engine’s integral fuel pumping system, which only works with liquid, can pull the fuel from the fuel tank to the engine. Similar Threads for: My carb leaks fuel out of the overflow hose at the bottom of my carb: Thread: Thread Starter: Forum: Replies: Last Post: KX 125 carb hose connections: D-r-e: 2-Stroke Dirt Bikes - Kawasaki: 9: 06-05-2013 12:31 AM: Fuel leaks out of one of the hoses in my carb: Danistheman: 4-Stroke Dirt Bikes - Yamaha: 4: 12-16-2012 07:09. You may not even see any visible leaks coming from your vehicle on the outside. A small amount of fuel spilled when an engine is tilted to the full up position is fairly normal for certain engines. Often times the fuel lines running to the injector will be the cause because they no longer seal properly, so this article will give you the tools the fix this malfunction yourself. Restarted it and it revved again. Mercury’s standard warranty coverage could also extend to the controls and rigging components on your boat. May be residual oil and gas dripping. In the fall when you figure your out on the water for the last time for the season, add fuel conditioner to your fuel tank and let it circulate throughout your entire fuel system before you put the boat up for winter. If your bad intake manifold gasket has caused an internal coolant leak, then the coolant is going to get into the intake manifold. If you want more than that, go for either the Merc or Volvo 8. Lean STFT Reading. Fuel fumes (either gasoline or diesel) must be dealt with right away. If the gas cap vent is plugged, the fuel is too lean so you need to choke the mixture to make it run. Ethanol is a solvent, according to outboard engine mechanics, and it dissolves seals, gaskets, hoses and even fiberglass boat fuel tanks. However, a boosted engine at 10psi will be resisting the fuel, causing effective pressure to drop to 48psi from the 58psi in the rail. Fiberglass fuel tanks developing a network of pinhole leaks is a common problem and there are also an astonishing number of accounts of rubber seals around the necks of fuel tanks being broken down within just six months. Most motor manuals include a section on troubleshooting. But everyone has an occasional snafu that requires some troubleshooting. The only thing I am afraid of is if the mechanical springs a leak fuel will go everywhere. Operator and franchisor of Quick-lube chain, Valvoline Instant Oil Change. My Dad has a 1958-59 5 1/2 hp Johnson Sea Horse outboard that runs perfectly. While many newer lawnmower models eschew the primer bulb in favor of a simpler starter lever, older models often use the primer bulb as part of the. Anytime you have a problem with an outboard, always check the owner’s manual for tips and tricks. In the real world, this means when you're driving down the highway and the engine is plenty warm and the airflow through the engine bay is taking warm air from the engine bay out through the bottom of the car. This is due to a loss of backpressure from the leak. View Product #2 AMRSWS-500 * Polyester Shrink Wrap Banding Strap 1/2" X1500'. The water pressure will compress the bladder so that the air pressure inside always matches the pressure outside perfectly. Leaky tanks also lose needed pressure to deliver fuel up the long hose back to the motor. The ignition timing may be set wrong. The fuel could evaporate too much that it would create too much vapor and would eventually inflict the engine. The gas cap is the easiest to check first and the easiest to fix. A Coolant leaking internally from the intake manifold gasket or cylinder head gasket can end up in one of two places: mixed with the engine oil or burned with the air-fuel mixture in the exhaust. The engine can’t run properly if the air/fuel mixture isn’t right. One important factor for me when I am looking for a new boat is the fuel economy. They are pretty simple engines, and few things can go wrong for well-cared-for motors. The easiest method to test for sufficient air flow is to use a manometer and measure engine compartment pressure. In larger engines, the fuel is injected into the engine. Step 2 - Find the Leak or Hole in the Gas Tank. The most common cause of an EVAP leak warning, or the Check Engine Light, is the gas cap not being. Sail Pro Model! Designed specifically for sail boaters. 1 L gas engine for the first time since purchasing it 4 months and 3,000 miles ago. A clogged fuel line inhibits the flow of fuel from the boat's gas tank to the engine. I finally yanked it, removed the carbon so it would close, installed it, but left it unplugged so I could drive home. i realized that the little metal piece that holds them down, was on upside down. When the intake manifold gasket is not running properly, that blood and energy supply is cut off. The boat designer often calls for an engine room ventilation system to match the original engine, but after a re-power the old ventilation system may no longer be sufficient. Designed with touches of comfort, style, and luxury throughout, the R30 features a hydraulic swim step that lowers into the water for easy access, a head compartment that doubles as a changing room and a helm equipped with Garmin screens – all to make your day on the water a memorable one. The problems are relatively easy to troubleshoot, whether it be an issue with the fuel line assembly or an oil leak. Otherwise the outboard motor could fall back down suddenly if oil in the power trim and tilt unit or in the power tilt unit loses pressure. It is the official list of gas engineers who are qualified to work legally on gas appliances. Priming boats aren't restricted to boat motors; they can be found on lawnmowers, weedeaters, leafblowers, and pretty much any other type of gas-powered motor. The engine can’t run properly if the air/fuel mixture isn’t right. Evinrude & Elto Outboard Motor Token. If so, make sure to run the boat long enough to get the. Simply mount it to a sturdy platform, place a big bucket underneath it and fill it with water so the propeller is fully submerged. I have no idea. The problem can't be the manual release valve since the engine only lowers by itself a few inches and if I put downward pressure on the lower unit, the engine will stop lowering when it gets to the trim rods (even with downward pressure, it won't go any further). About 8 months later the one was loose and leaked. Fuel injectors have individual components – pintles, balls and discs that must be properly sealed while under operating pressure to avoid leaking. You have no items in your shopping cart. However, to put the boat on plane with a full load of 5 people and gear, a 30 HP motor may be required. It scours gunk from fuel tank walls and it all ends up clogging fuel lines, carburetors and fuel injectors, which results in poor engine performance, stalling, loss of power, and eventually big bucks spent at. My fuel line is leaking fuel at the motor connection. Boat ran ok after that but still lagging on that engine. Sufficient fuel must be reaching the engine. Does appear to be getting worse. However, a boosted engine at 10psi will be resisting the fuel, causing effective pressure to drop to 48psi from the 58psi in the rail. Each time a new charge of air/fuel is loaded into the combustion chamber, part of it leaks out through the exhaust port. Save my name, email, and website in this browser for the next time I comment. The problems that arise from an engine vacuum leak can be more than annoying. Normal operational height of fuel in the carb is below MAX fuel level ,thus soft ball. But boats that are run at non-planing speeds may not heat the oil up very much at all. I'm trying to figure out if I just want to have all the paint removed or go with replacement. A new Top Cowl Service Door on Verado motors provides easy engine-oil checks and fills. needle and seat are obstructed with foreign material 3. i realized that the little metal piece that holds them down, was on upside down. Any air in the system needs to be vented (bled) before the engine will operate properly. capt have you cheked oil for gas. If your vehicle has an engine vacuum leak, the air-fuel ratio in your engine will be higher than 14. The other was a '90 or '91 350 Chevrolet marine engine (in a boat, of course). Troubleshooting An Air Leak. Do it yourself! This step-by-step guide takes you through a service of a small 2-stroke outboard. I was not happy. com Senior Editor, Lenny Rudow, as he walks us through the most common outboard engine issues, particularly involving fuel systems and flushing. With the Engine oil drain tube right on the side of the mid section a person does not need to be a back yard mechanic to enjoy taking care of his motor. Symptoms include: over reving, overheating, stalling on acceleration, failure to idle, and worst of all, an engine seizure if the problem is neglected. This would need to be fixed as well for the engine to opperate correctly. raditor is new It has a 1975 camero front clip on it. Why doesn’t the oil get hot enough to steam it off? A. I am interested what it would cost to replace and/or rebuild my carburetor. When this occurs, there’s a constant fluctuation in the amount of fuel that’s pumped to the boat’s carburetors, and as a result, the motor’s RPMs go up and down. It kicked right over with very little choke. An unexpected change in the performance of your boat motor can put a damper on a day of fun on the water or even prevent you from leaving the dock. I'm not sure why there isn't a recall on it when apparently these cars are notorious for these issues. Advertisement. My craftsman lawnmower (which has an engine design the same as other brands) started to leak gas from the tank. P1134 Bank 1 Fuel Control Shifted Rich - Read Our Article on Oxygen Sensor Codes For Help With This Mercury Check Engine Light Code P1135 Pedal Position Sensor A Circuit Intermittent P1137 Lack of Downstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank 1 - Read Our Article on Oxygen Sensor Codes For Help With This Mercury Check. In my line of work, we/I use flashlights and headlamps quite a bit on the second 1/2 of our shift. You should allow the engine to burn the small amount of fuel that is in the carburetor. Anytime you have a problem with an outboard, always check the owner’s manual for tips and tricks. You do not need to store or lay up your boat with full fuel tanks. Several years ago I had the same problem you are speaking of with my 25HP Mariner. Check for a split gas line. Yes I think a carburetor kit my rectify your fuel leak problem, there are four possible reasons why the carb is leaking. (GM referred to these as pulsator hoses. Our handy resources can help you determine if your car might be leaking, and if so, what you can do about it. Some smoke came out when i first started it and everything was ok. One frequently misdiagnosed problem first occurred in many early-’80s and ’90s vehicles and resulted from a leak in the hose connecting the fuel pump outlet to the sending unit inlet. The lean condition can also be caused by fresh air entering the engine somewhere it shouldn't. Over time, the power tilt and trim motors can experience corrosion, especially if you run your boat in saltwater. If you notice gas mixed in with your engine oil, follow these instructions to address a potential leak. ) Fuel line between tank and engine. But everyone has an occasional snafu that requires some troubleshooting. This forces gas out of the sides of the bowl. A new Top Cowl Service Door on Verado motors provides easy engine-oil checks and fills. EVAP System Vent Problems – Gas Won’t Go Into Tank December 24, 2010 2:30 pm dennisb - Auto Tool Sales Check Engine Light, DIY, EVAP, How To Auto Repair. Search: Search. Atomization. I am interested what it would cost to replace and/or rebuild my carburetor. Ethanol is a solvent, according to outboard engine mechanics, and it dissolves seals, gaskets, hoses and even fiberglass boat fuel tanks. Engine exhaust back pressure is defined as the exhaust gas pressure that is produced by the engine to overcome the hydraulic resistance of the exhaust system in order to discharge the gases into the atmosphere. Sufficient fuel must be reaching the engine.