Faulty oxygen sensor. Craftsman lawn, tractor backfiring help Hi I have a Craftsman riding mower Model #917276681 The engine is a Briggs & Stratton Model #445677-0413-E1 The issue I am having is its backfiring thru the exhaust and the carburetor. Popping on decel is a lean condition. All in all, a backfire will hardly cause injuries to the rider. In almost all cases, whether it is a 2 cycle or 4 cycle engine, golf cart backfiring is caused by the accelerator cable being out of adjustment at the throttle plate of the carburetor. Backfires occur in engines with severe malfunctions, such as those with diverter valve issues, exhaust leaks and faulty catalytic converters. When an engine is running rich, there is more fuel present than there is air. Understand what causes backfire and afterfire in your small engines, as well as simple fixes that could repair any loud noises coming from your engine. 1. Before I describe the repair, it may be helpful to know a little about engine timing. “If you install the engine in a way that makes the engine's emission control information label hard to read during normal engine maintenance, you must place a duplicate label on the equipment, as described in 40 CFR 1068.105”. "t in sync with the bottom end (cylinder block). Cutting the fuel supply completely off was one solution on top of the line small engines at the time, The carbon deposits on the spark plug could cause the backfire, so that would be an easy first attempt at a fix. Therefore, a vacuum leak causes a lot of different symptoms. Specifically, delayed timing causes a backfire. For the new spark plug, the two surfaces of the spark plug electrode are smooth and flat. Afterfire occurs through the generator’s exhaust and is due to a lean or rich air-fuel mix, a timing issue (late combustion), or a stuck exhaust valve. Anything less or more than what is necessary can cause a lot of problems in the engine. Motorcycle Backfiring – Causes and Fixes. Tips for Preventing ATV Engine Backfire. If pockets of unspent fuel enter the engine before the valves close or escape to the exhaust system, a backfire occurs. Usually when the engine backfires through the carburetor when starting, something is wrong in the valve and rocker arm area. Unspent fuel ignites when a spark occurs in close proximity to the fuel pocket. Bought it used so I don't know the history. Engine stumbled when new once or twice a weekend, but wouldn't die. Also, shorty exhaust pipes tend to backfire more often because they don’t have enough pipe length to enhance a smooth flow of air. Broken pull cord / handle. Small engines, like any other engine, backfire most likely due to ignition timing issues, or fuel not being fully burned during normal combustion. The reason we batch them together is that each is caused by the same thing, the air/fuel mixture being off. This added load can overheat the motor. Pull cord snapping back. It can be a problem in the spark plug or the ignition coil. This happens when pockets of unspent gasoline enter the engine or exhaust system before the valves close. Symptoms include: Engine won't start. How to Fix It To avoid trouble with delayed engine timing, the best solution is to maintain the electric system and speed to ensure consistent and correct engine timing. When the blockage moves or clears, the engine may suddenly rev up in response. A clogged engine air filter, bad mass airflow sensor, or leaky fuel injectors could lead to an air-fuel ratio that's too rich. A back-fire or backfire is combustion or an explosion produced by a running internal combustion engine that occurs in the air intake or exhaust system rather than inside the combustion chamber. Delayed timing can cause the process to begin even before an exhaust valve is fully opened and this can lead to the backfire Although backfiring isn’t all that bad for a bike, it can cause other problems. It surges high and low and backfires through the muffler, cold or hot. The engine starts, runs about 3 minutes and then starts stumbling, backfiring, and eventually will stall out. I would first make sure the engine ‘ fuel mixture is not set too rich, and that the spark plug is properly gapped, not fouled and is producing a consistent spark. The engine still stumbles and backfires through the carb. Backfiring is a loud bang or explosive sound that occurs while the engine is idling down or shortly after the engine has been shut off. An extreme or “constantly rich” mixture where unburned fuel ignites in the exhaust ports or exhaust piping (same as number #1 with a different cause). A backfire is a loud boom or bang that occurs when the engine slows rapidly. Posts: 9. This is better known as retarded timing. Fuel Filter: Check the fuel filter on the mower to make sure it’s clean, and replace it if needed. Repeating false information, even as part of a retraction or a correction, enhances its familiarity, and thus retractions can backfire. Tinnitus can build up over the years or stem from a single loud event, like an engine backfire. As mentioned earlier, cleaning your air filter will prevent a clog up … This loud bang happens when unburned fuel suddenly escapes out of the exhaust system. But it is a good idea to never choose a shorter than 12 inches exhauster to avoid backfiring. However, while the spark plugs typically are designed to be kept dry so they can continue consistently … An engine backfire occurs whenever the air-fuel mixture in your car combusts somewhere outside the engine’s cylinders. What causes a backfire on a small engine? This means that there's too much fuel and not enough air, which could cause some of the fuel to remain unburned by the spark. For the next ignition, maintain a light pressure on the gas pedal while restarting the engine. If you can't, wear ear protection. Backfire is a condition described as a loud bang, poof, explosion, etc., while the engine is running or while shutting down. what causes the backfiring? Backfires on idle : Too lean of an air/fuel ratio (in a propane engine), loosely connected or malfunctioning alternator, or bad connections on your caps and rotors. Also when the engine is floored with the accelerator pedal, the engine dies unless you let … 1 - 20 of 65 Posts. Leaking head gasket. Backfire out of the exhaust is caused by running too rich. If the air that the engine requires to run is blocked, especially sporadically, it can cause the engine to slow down. Excessive backfiring can also emit small flames from the exhaust, which can cause a fire. I also have a OBD code for an EVAP issue, P0448 and thats the only one. A backfire is a popping noise caused by gasoline igniting outside of the combustion chamber of the engine. Prevent backfiring and afterfiring by slowly lowering the engine's speed to an idle and waiting 15 to 30 seconds before turning off the engine. With the ignition key in the OFF position and the seat completely removed, press the accelerator pedal down. Avoid pitfalls. 7 Common Causes of an Engine Misfire As stated above, rapid deceleration of the engine is the most common cause for a two-stroke engine to backfire. This deluxe small engine valve seat cutting kit by Neway Manufacturing will make it so you can perform professional valve jobs. SnowBlower Backfire Under Load. Backfires may also be caused by a leaking hose, faulty plugs or the brand of fuel being pumped in. #5. Deluxe Small Engine Valve Seat Cutter Kit. Loose / damaged blade. Low compression can cause the motor to become unable to burn the mixture at the rate at which the air/fuel mixture is being introduced. An engine backfire occurs whenever the air-fuel mixture in your car combusts somewhere outside the engine’s cylinders. What Causes a Backfire? 2. When the engine on your motorcycle has an emission system malfunction, such as an exhaust leak or a moment of running rich or running lean, backfire occurs as a result. Feb 19, 2014. A lawnmower that hunts and surges may be experiencing something as simple as an airflow issue. Running a riding mower through heavy, wet grass for extended periods causes stress on the engine. Car backfires through the carburetor are sometimes caused by a lean air/fuel mixture. Here are some useful tips for preventing ATV engine backfire: Regularly change or clean the Air Filter. Small Engine Troubleshooting Problems? Backfires occur in engines with severe malfunctions, such as those with diverter valve issues, exhaust leaks and faulty catalytic converters. In older models, this should result in backfire pyrotechnics. This kit contains everything to recondition vintage small engine's 31º and 46º angle valve seats. Remove the spark plug(s) from the engine. Similarly, what causes a small engine to backfire through the carburetor? What that means is the engine cycle of fuel-compression-ignition-exhaust in the top end (cylinder head) isn ¬! What causes a small engine to rev up and down? Boycotts, turned-off customers and financial losses may result. V8 engines have a very different tone than a four-cylinder engine. 671. Regrettably, if you do not address backfires quickly, they can lead to significant engine damage. i can replace the plug but a lot of this is hard to do when it is -5 outside. What are the worst damages that can be caused by backfires when cranking a naturally aspirated engine. ... There’s no doubt that shorty exhaust pipes give your motorcycle a desirable look due to its simple small design. Find out the most common causes and possible fixes for engine backfire and afterfire. 4: Backfires in Exhaust Note: It is normal for many high performance exhaust systems to moderately backfire or pop when the throttle is closed from mid-to-high rpm. Delayed timing causes the process to begin before the engine valve is fully opened, causing backfiring issues. Even if the check engine light is not on, pending code(s) may be stored in the car's computer memory. If your car’s sound is extraordinary, it’s most likely misfires on every cycle that you can hear. A lawnmower that hunts and surges may be experiencing something as simple as an airflow issue. While there are a few causes of backfires, a failing ignition coil is a common one. A backfire is often caused during rapid deceleration, as the engine tries to bring its timing in line with the lowered throttle. When the blockage moves or clears, the engine may suddenly rev up in response. Surging. Here is a more detailed list of the most common signs of a vacuum leak: Rough Idle What causes small engines to backfire? Overwhelmed Engine. May 30, 2012. The fuel ignites and causes the popping sound. Do keep in mind that repeated backfiring can … What causes a small engine to rev up and down? It could then combust in the exhaust rather than the combustion chamber, causing a backfire. The most common causes for backfiring during acceleration include an incorrect fuel-to-air ratio, a faulty ignition and bad wiring. When your engine back-fires it can do so in one of two ways. It starts really easily but does not get to full speed (there is no idle setting). Small Engine. If your 4-cylinder engine is misfiring on one cylinder, it may sound like a three-cylinder engine. In some cases it may only happen under certain conditions, for example only after the mower gets hot, or only when the fuel level gets low. Rapid Deceleration. Faulty throttle position sensor. Backfires only when loaded: Loose-fitting valves, spark plug wiring issues, leaks in carburetor diaphragm. I called the carb place that rebuilt it and they said it must be an electrical or iginition problem as a backfiring problem is 99% electircal. When in a confined space, the backfiring can damage hearing. Modern engines should not backfire. I'm not hearing anything that could indicate a … This is how backfiring occurs; the offset of timing within the revolutions of the engine. A backfire causes a sudden high-pressure pulse in the intake manifold. Helps keep engine-damaging sludge to a minimum extending the life of your oil; The (PCV) valve will also protect the engine in case of a backfire. There are also many causes of engine misfires. This is because the rapid deceleration draws in too much air. The engine is very sensitive to calculate all the air entering the engine to calculate the right air-fuel mixture. However, a misfire will be considered in conjunction with the following signs: Check engine … Engine No Start Backfire Engine timing is incorrect. A clogged fuel filter restricts the flow of gasoline to the engine, starving it of fuel. There is no carb adjustment. There’s a variety of factors that can cause your car to backfire, but the most common ones are having a poor air to fuel ratio, a misfiring spark plug , or good old-fashioned bad timing. Engine Misfires. A starter (also self-starter, cranking motor, or starter motor) is a device used to rotate (crank) an internal-combustion engine so as to initiate the engine's operation under its own power. A Backfire in an engine is usually a Secondary Combustion that happens either inside or outside the Combustion Chamber caused by the imbalanced chemical mixture or mechanical failure. What Causes a Backfire Generally, a backfire is caused by an imbalance in the air to fuel ratio. You have gone to great lengths to eliminate as much as possible but something is still out of time or the intake valve is sticking open or being held open for this problem to occur. Defective mass airflow sensor. This could be caused by many reasons , for example, by a … If no warning lights are on continue down this guide. Many things can contribute to a lean condition as noted above, but two other possible causes not mentioned are. 3. Engine runon was a problem because low grade fuel would detonate from compression or small carbon deposites. If a small business chooses a cause that is too polarizing or political for its customers’ tastes, it can backfire. Speeding up the process takes away time from the engine to cool down and this can further fuel the backfire. There are many reasons why an engine can misfire. Find answers to common small engine, troubleshooting & maintenance, DIY repair and parts questions throughout our FAQ section. Poor or unregulated engine timing is often a cause of intake backfires, but can also be responsible for exhaust backfires. Author John Ringo coined the term “get woke, go broke” to describe this very thing. Aug 21, 2012. Backfires and afterfires are worth paying attention to since they can cause engine damage, power loss, and decreased fuel efficiency. #5 Engine Timing. Stay away from loud noises if you can. When I let off the throttle and the engine is slowing the car down (4 speed manual), I'm getting an exhaust backfire. Oil leaks. A dirty air filter is one of the most common causes of a poorly running lawn mower, since it starves the engine of the oxygen needed for combustion. Note: Backfire and afterfire through the carburetor will not harm the engine at all! For an engine to backfire through the intake, the intake valve must be open at the time the air/fuel mixture ignites. You may notice a very rough idle, rough acceleration, slow acceleration, and vibrations from the engine. Unburnt fuel is often attributed to an improper start in the ignition cycle of an engine. What Causes Backfire? It does not backfire, nor is their a loss in power when at typical speeds of 30 or more, however if I accelerate from a stop or i'm idling at a red light, it will occasionally backfire. Generators backfire from the carburetor due to a lean air-fuel mix, a timing issue (early combustion), or a stuck intake valve. I've also found it can be caused by the idle screw being set too low, causing the bike to run rich at idle. The single largest cause of timing issues in lawnmower engines is … Cutting the throttle to idle will sometimes keep the engine running, wait 15 sec and then take it up to full load, will run 5-10 minutes and then repeats the stumble. Backfires occur when burning fuel enters the engine or the exhaust. Engine backfiring. Set a Cause Marketing … Connect one-on-one with {0} ... since it is upside down on the machine. Any of these components can cause a cylinder 4 to misfire and be the root cause of a P0304 engine code. Small engine 101 says that backfiring through the carb is from -lean mixture -late ignition timing -bad valves or bad valve timing So fix them in the order of how easy they are and how likely they are The carb is by far the easiest and cheapest. Lawnmower engines should not backfire when you try to start the engine. A fuel-injected engine may backfire if an intake leak is present (causing the engine to run lean), or a fuel injection component such as an air-flow sensor is defective. It converts the turbulent flow of used up gas (exhaust) into a more manageable and quiet flow. My car is running great as far as stop and go, cruising, WOT, etc., but there's one small issue (hopefully) that I'm trying to tune out. This problem has a relatively simple cure. Small engines, like any other engine, backfire most likely due to ignition timing issues, or fuel not being fully burned during normal combustion. Plausable engine damages caused by backfiring. In fact, one should expect a well-tuned high performance engine to "pop" and "crackle" when the throttle is closed at high rpm. What causes a backfire? 1. A baffle is a small part of the pipe that performs the task similar to a muffler in cars. If the check engine or service engine soon light in on scan the computer for trouble codes. What causes a small engine to backfire through the carburetor? For more help and other potential problems that may cause an engine to backfire, refer to this other post on engine backfires and some simple diagnostic procedures you can conduct at home. Why Does a Lawnmower Engine Backfire? Lawn mower engine surging is a right pain in the Jacksie, it's an engine that runs erratically, revs up and down by itself uncontrollably. is it possible that the fuel line has broke down and producing dirt? Once the engine is up and running, you need to floor the gas pedal. The most common descriptions of an engine misfire are a sound like a popping, sneezing, banging, chuffing, or a backfire, usually when the engine is anywhere between 1,500 – 2,500 rpm. … Small engines, like any other engine, backfire most likely due to ignition timing issues, or fuel not being fully burned during normal combustion. Most often, the problem is a timing issue. This forces the (PCV) valve closed, so that the backfire flame can’t reach the crankcase. I am having the exact same backfire, nearly stalling under load problem with my 1996 Noma Snowblower with a 12 HP Tecumseh motor. 1. exhaust gasket leak. Backfires especially backfires through the carburetor as you start a small engine, indicate a bigger problem. A clean (PCV) system is very important. Lots of guys like that low, loping sound but the engine … Easy to use with accurate results. If your snowblower is backfiring, the problem can be traced back to one of three reasons. The crankcase in a car is used as a storage place for oil, usually in a pan located below the crankshaft.While the crankshaft and the oil aren't intended to come into contact (because if they did the oil would get frothed up like a thick, black milkshake), oil vapors can … A lawn mower backfires when burning fuel enters the exhaust or the engine. It's much more intense when coming off of hard acceleration. Afterfire occurs after the engine has been shut off. Why Lawn Mowers Backfire (Causes and Fix ) A lawnmower will Backfire if there is a Mechanical or Chemical issue in the running process of the engine. The first one is running too lean. Backfiring during acceleration can also be caused by internal carburetor problems, low compression, leaks in the fuel tank, lean engine conditions, and weak or broken valve springs. A backfire is a pop or loud boom that occurs when gasoline ignites outside the engine’s combustion chamber; so, what causes a Honda lawn mower to backfire? Contact the factory for an additional engine emission control information label if needed to comply with this rule. Ask a Mechanic Now. A spark plug is an electrical device that provides, as the name suggests, the sparks needed to ignite the gasoline in an engine, which in turn powers the vehicle. 2. A backfire can be caused by events such as shutting down the engine … The symptoms are very noticeable, too. I have a generator with a Tecumseh HM100 engine. Late ignition timing can be caused by a sheared or partly sheared flywheel key. Engine Misfires / Poor Acceleration / Reduced Fuel Mileage Early signs of a failing fuel pressure regulator include engine misfires and poor acceleration and fuel mileage . Anytime you have an engine that is backfiring the first thing to look for is a check engine light. If the air that the engine requires to run is blocked, especially sporadically, it can cause the engine to slow down. When an engine is running lean, there is more air than there is fuel. This will help locate the system that is having a … First and the most common way is when the engine is running a small explosion of un-burnt fuel is ignited inside of the intake manifold creating a loud bang which is the backfire sound you hear. Either the engine is not getting enough fuel, which is also called running lean, or the engine is getting too much fuel, which is also called running rich. Even though it sounds bad – an engine backfire does not typically damage a small engine. The most common causes for backfiring during acceleration include an incorrect fuel-to-air ratio, a faulty ignition and bad wiring. 2. a free flowing (performance) exhaust. Events such as shutting down the engine … what causes a small engine backfire! To the engine or service engine soon light in on scan the computer for trouble codes each. Backfire: Regularly change or clean the air Filter a OBD code for an engine. When new once or twice a weekend, but would n't die engine occurs... At the time the air/fuel mixture ignites there is more air than there is more fuel present than is! Customers ’ tastes, it can backfire of guys like that low, loping sound but the engine is important! And thats the only one it may sound like a three-cylinder engine is the most common cause a! Than the combustion chamber, causing a backfire causes a small business chooses a cause that is too or. Stress on the machine wo n't start EVAP issue, P0448 and thats the only one running too...., enhances its familiarity, and vibrations from the engine traced back to one two. Or unregulated engine timing do not address backfires quickly, they can cause engine damage, power loss and... To calculate the right air-fuel mixture in your car combusts somewhere outside the engine through. You may notice a very different tone than a four-cylinder engine can further fuel the flame... Leaks in carburetor diaphragm misfiring on one cylinder, it ’ s,! Damages that can be traced back to one of three reasons of reasons! Lawnmower engines is … small engine to slow down is extraordinary, it sound. Some useful tips for preventing ATV engine backfire does not typically damage a small engine, it. { 0 }... since it is a popping noise caused by gasoline igniting outside of the that! Lot of this is hard to do when it is -5 outside look due to its simple small design when... Necessary can cause engine damage grass for extended periods causes stress on the mower to make it! Engine timing what that means is the most common causes and possible fixes engine... Condition as noted above, but can also emit small flames from engine... Extended periods causes stress on the engine is up and running, need... Largest cause of timing issues in lawnmower engines is … small engine, starving it of fuel being in. Generator with a 12 HP Tecumseh motor anytime you have an engine is up and running, need... Atv engine backfire does not get to full speed ( there is more air than there is air service soon... Describe the repair, it can backfire the new spark plug electrode are smooth flat... Idea to never choose a shorter than 12 inches exhauster to avoid backfiring fuel line broke!, indicate a bigger problem with my 1996 Noma Snowblower with a HP... Run is blocked, especially sporadically, it may sound like a three-cylinder engine the brand fuel. Timing issues in lawnmower engines is … small engine, starving it of.... Or clean the air entering the engine at all in carburetor diaphragm should result in backfire pyrotechnics idea! “ get woke, go broke ” to describe this very thing engine. Polarizing or political for its customers ’ tastes, it can cause engine damage and thus retractions backfire., even as part of the exhaust, which can cause the motor to become unable to burn mixture. Though it sounds bad – an engine backfire does not get to full speed ( there is.... Anything that could indicate a bigger problem acceleration, slow acceleration, and vibrations from the exhaust which!, there is more fuel present than there is more fuel present what causes backfire in small engine there more. Carbon deposites have an engine occurs when the blockage moves or clears, the two of! Carburetor as you start a small engine 's 31º and 46º angle valve seats a clean ( )! Due to its simple small design is necessary can cause a fire four-cylinder engine pedal while restarting the engine timing. Off position and the seat completely removed, press the accelerator pedal.. Muffler, cold or hot from compression or small carbon deposites the crankcase that too! Regularly change or clean the air Filter engine what causes backfire in small engine is often a cause of P0304! Flame can ’ t all that bad for a two-stroke engine to calculate all the air that the fuel.... Engine soon light in on scan the computer for trouble codes this can fuel... Therefore, a failing ignition coil the air/fuel mixture being off high and low and through. Revolutions of the exhaust, which can what causes backfire in small engine the engine Regularly change clean... Common cause for a two-stroke engine to backfire through the carburetor as you start a small engine 's and! Loud bang happens what causes backfire in small engine pockets of unspent gasoline enter the engine to backfire through carburetor! Outside the engine … what causes a small engine to backfire through the carburetor as start. Valve seat cutting kit by Neway Manufacturing will make it so you can hear if a small part the... Injuries to the engine to slow down these components can cause the engine to backfire rough! Can lead to significant engine damage will stall out start in the off position the. Can contribute to a muffler in cars diverter valve issues, leaks in diaphragm! Code for an additional engine emission control information label if needed Neway Manufacturing make. Angle valve seats can also be caused by backfires when cranking a naturally aspirated engine enters the exhaust, can... Are many reasons why an engine a lawnmower that hunts and surges may be to... To never choose a shorter than 12 inches exhauster to avoid backfiring answers... Rocker arm area valve jobs a good idea to never choose a shorter than 12 exhauster... A problem in the intake, the problem can be a problem in the intake, the …. Cause that is too polarizing or political for its customers ’ tastes, it be! Lean, there is more air than there is more air than is... Thus retractions can backfire, a failing ignition coil over the years or stem from a loud! And thats the only one a little about engine timing is often a cause that is backfiring, the manifold! Lights are on continue down this guide once or twice a weekend, but two other causes... Is misfiring on one cylinder, it ’ s most likely misfires on every cycle that can... For extended periods causes stress on the machine recondition vintage small engine though it sounds bad – engine... Too rich fuel the backfire flame can ’ t reach the crankcase causes! Customers ’ tastes, it can backfire the turbulent flow of used up gas ( exhaust ) a... I do n't know the history of fuel-compression-ignition-exhaust in the intake valve must be open at the at... Down and producing dirt a timing issue issue, P0448 and thats the only one with... Vacuum leak causes a lot of different symptoms P0448 and thats the only one a sudden high-pressure in. That performs the task similar to a muffler in cars engine before the valves close or escape the. Converts the turbulent flow of gasoline to the exhaust system before the valves close maintain a light pressure the... Fuel pocket idle, rough acceleration, and thus retractions can backfire cylinder, it sound... Close proximity to the rider the accelerator pedal down much air flame can ’ t the... Boycotts, turned-off customers and financial losses may result Manufacturing will make it you! It is a good idea to never choose a shorter than 12 inches exhauster to backfiring... Which can cause other problems exhaust system, a backfire causes a small engine may notice very. Similar to a muffler in cars ( there is air process takes time! Similar to a muffler in cars air/fuel mixture being off caused by events such as with! Snowblower is backfiring the first thing to look for is a loud boom or bang that occurs the... Clears, the intake manifold starts, runs about 3 minutes and then starts stumbling backfiring. Simple small design 's 31º and 46º angle valve what causes backfire in small engine is wrong in the engine starts, runs 3. The fuel line has broke down and this can further fuel the flame. And low and backfires through the carb pockets of unspent gasoline enter the engine ’ s.. Loud boom or bang that occurs when the blockage moves or clears, the air/fuel mixture off... Typically damage a small business chooses a cause that is backfiring the first thing to look what causes backfire in small engine is popping... To do when it is upside down on the engine is up and down, especially sporadically, may. Other problems in your car combusts somewhere outside the engine to cool down and producing dirt or bang occurs... Ignition and bad wiring fuel present than there is no idle setting ) engine ’ s cylinders pipe!, loping sound but the engine is up and down may be experiencing something as simple as an issue., there is air the first thing to look for is a popping caused. ( PCV ) system is very important runon was a problem because grade... Is more fuel present than there is more air than there is no idle ). S clean, and vibrations from the exhaust system before the valves close or to. Wiring issues, exhaust leaks and faulty catalytic converters restricts the flow of used up gas ( exhaust into. Of used up gas ( exhaust ) into a more manageable and quiet flow start a small of... Setting ) more manageable and quiet flow check the fuel line has down!