Note that if you find contamination such as dirt or gummed up fuel at wone spot, the whole system is likely dirty and needs a complete clean for the best result. Assuming all of your plugs and wires are in the correct locations and you haven't messed with the timing at all, then the most common cause of backfiring through the carb (spitting or coughing) is in the morning when a carb's air/fuel mixture is a bit too lean. Iv got a little problem with my 1.5 riley rma. Usually the cause starts with dirty air filters that gets the carbs dirty which then cause the polaris to run rich and the plug will start to foul. This results in a fuel mixture that is too lean for the engine and results in backfires through the carburetor. Its back firing through one carb more than the other one and back firing through the exhaust. Why does my carburetor spitting out gas? Senior Member; Posts: 1194; What causes a motor to spit through the carb? A quad will spit and sputer when it is running rich. It idled rougher than ever and was … Ill try to make this as short as possible, I have a 2004carburated sportsman 700 twin that I just replaced the crank and all bearings in. « on: May 24, 2008, 07:06:07 PM » A friend told me it could be stuck valves, but I don't know. My buddy has a big bear 400 that is … Discussion Starter • #1 • Sep 12, 2014. i got a 1998 big bear. 8 Posts . Hope this helps! This is to say that where the carburetor timing is such that there isn't enough time for complete combustion of fuel in the combustion chambers before the "next" mixture jets in, or where the carburetor is feeding … Help!!!!! Messages: 1,831 Likes Received: 0. May have to do this a couple of time … Utility ATV ; Spitting back through carb. Submitted: 11 years ago. etc. The solution to this problem is to clean the carburetor, fuel lines and supporting fuel system parts. Member. Footage taken from Holley Carburetor Installation & Tuning DVD I herd that a worn cam or a torn intake boot might be my problem. If I place my hand over air filter side and leave about 1/8 inch between hand and carb then crank it it will start but … Poping through carb? JACUSTOMER-llkxpg7a- : i haved cleaned carb 3 times maybe there is something wrong with … Now I know its not a mini but an engine is an engine and the basics are all the same which is why I posted here. Answered in … Discussion Starter • #1 • Feb 24, 2011. As it does, it gets a little thick and can clog up the jets in your carburetor. The engine was just rebuilt and the carb was also restored and rebuilt. By RedneckBobby, April 21, 2017 in Suzuki ATV Forum. Thought I had it, but alas seems to change its mind if I look at it funny. Readjusted. There are a number of causes for that which should be investigated starting with a compression test to see if one of the cylinders is significantly lower than the other. on: May 17, 2009, 06:09:31 am. If you hear a sudden change in engine idle, thats where the leak is. Joined: Jun 1, 2005 Location: "Rochester" NY. Reply to this topic; Start new topic; Recommended Posts. How long did the ATV sit up and did you mess with the float heighth ? This thing gets tons of beach sand thrown at it 24/7. Help!!!!! This usually goes away once the engine warms-up. I completed a rebuild of our 99 400EX because it smoked like a 2 stroke. 02-06-2010, 05:48 PM . A problem which plaged the 3 cylinder Evinrudes. Yes it did Rick. It seemed like it did this all at once without any warning. They were very far apart. Carburetor cleaner is used to clean all of the solvent from the carburetor body. Hope that helps,,,,, Busmech. RedneckBobby 0 RedneckBobby 0 Forum Beginner; Members; 0 4 posts; Posted April 21, 2017. of course it's an off sized tap Well needless to say I have bigger … In a 2 stroke 70H.P Veinrude, the spitting of fuel back through the carb can be caused by excessive fuel - a carb problem- and/or a reed valve problem. A new piston and fresh rings will work wonders!!!! So, carefully check each of these areas and make repairs as needed. Don’t worry, there are pretty straight forward things you can do to check where your problem is. Starts up and idles good, once you start giving it throttle it acts as if its starving for fuel. The dwell was set to 30 while the vacuum advance was disconnected. 21 Posts . Author Topic: What causes a motor to spit through the carb? Tags. About every 7 to 10 sec. Messages: 1,523 Likes Received: 1. just put a new top end on my foreman. In essence, once the degraded oil begins to compile, it is not as likely that you will burn through it without experiencing the jolt of an ATV backfire in the process. what size is the main jet in your carb and are you running with the airbox lid on or off? … Prior to yesterday, the car ran great better than it has ever run before. Carb spittning on startup. Thread starter Jstinson; Start date Jul 13, 2015; J. Jstinson Forum Newbie. Both carburated and fuel injected … So I posted my question about the main jet thread size earlier. Mid and top rpms are greaat. It will start fine and idle perfect, but as soon as I touch the throttle it'll pop and backfire like crazy at the carb. If needed, go back with the brush. Facebook; Twitter; Youtube; Instagram; Pinterest; Newsletter; Sign in to follow this . There are a few different reasons you may not be getting fuel to your engine. 2003 kawasaki 650 prairie 4x4,backfire through carb and exhaust under acceleration,warm or cold,thinking of rebuilding carbs,also drive belt light flashing,new belt,deflection is good,how do i turn off light? Nitroexpress Veteran Member. The piston hit the top and bent the intake … Latest Posts. It wasn't before, now it is. The vehicle is a 70 El Camino SS 396 with a Q-jet carb. Joined Jun 29, 2015 Threads 3 Messages 5. M. Mikel1 Well-Known Member. Low Fuel Pressure or Weak Fuel Pump—Like a clogged fuel filter, this would cause your engine to not get enough fuel to the combustion chamber. The timing was set to 8 degrees before TDC with the vacuum hose to the advance disconnected and blocked. … I would suspect an intake valve is hanging a bit allowing pressure back through the carb. Technical Backfire/Spitting through carb - troubleshoot? It can also be an early indicator of engine failure.... compression leaking by rings that are failing and are gouging the cylinder wall. S ... One of the most common problems that customers complain about is the spit-cough-pop from the carburetor as a Harley goes from idle to ¼ throttle. Intake manifold air leak: A lean condition due to an intake manifold air leak can cause backfiring. Penix Veteran Member. The steps involved are a bit different depending on whether your ATV has EFI (electronic fuel injection) or a traditional carburetor system. It’s not that hard to check the parts to see if their … Started better, once. (Read 19243 times) team39763. Discussion Starter • #21 • Mar 12, 2014. When I accelerate I find it spits back though the carburetor. Typical tools required include a flat head screw-driver, compressed air, an 8mm wrench and carburetor cleaner. The rebuild consisted of a new wiesco piston and rings(std bore), redoing the valves with new … Page 1 of 2 1 2 Next > Jul 6, 2006 #1. afraid2fly afraid2fly TT Member; Members; 92 posts; Location: Alabama; Posted July 13, 2010. I tried the 670 Avenger carb on my truck and it ran like crap, just like my Holley 750DP. Richard G. : Did you soak this carb in cleaner ? Lol Greg was a lot of help and it's greatly appreciated instead of smart remarks. View Full Version : Backfiring through the carb after rebuild. shop manual not any help. jest2dogs. Yamaha Spitting back through carb. ATV Riders Forum > Sport ATV Model Information > Honda TRX 400EX & 400X ATV Info > Backfiring through the carb after rebuild. Of course, this can become a safety concern when you begin to experience it regularly. Discussion Starter • #1 • Apr 20, 2011. alright here is one for everyone to think on. Profile Page. 89 Polaris Ranger500 6x6 side by sideis coughing,spitting and backfireing thew carb.whats the fix I would start by pulling and cleaning the carb, air filter and spark plug. The most common reason an ATV engine is not getting fuel usually has to do with the carburetor. Carburetor jetting: An overly-lean low-speed circuit, non-functioning accelerator pump or clogged pilot jet can contribute to … on a reed valve moto piston/rings and reeds!!!!! Gummed-up Carburetor—If you let fuel sit in your fuel tank for months without using it and your ATV has a carburetor then the fuel in the tank will start to degrade. 9 Posts . Note: Some gaskets and plastic components will swell if exposed to carb cleaner so remove these prior to use. when you start it up on choke it sounds normal, then you bump it down to half choke, it … Show Less. Any help will be greatly appreciated. Joined Jul 21, 2013 Threads 10 Messages 895. Author Topic: Carburetor spitting on startup (Read 7186 times) 0 Members and 1 Guest are viewing this topic. Backfiring through the carb (spitting or coughing) usually occurs in … But wil kept running for about 4 mins … did you put the carb back together correctly? Show More . Callled Vince and consulted mechanic … ATV Pull Behind Mower – Specs, Types … 2Carpros: What Is An Engine Backfire "Haynes Repair Manual: Jeep Wrangler 1987 thru 2008"; Mike Stubblefield and John Haynes; 2009 ; Writer Bio. Share this conversation. eprovenzano. Starts right up , don't smoke a bit. I got everything put back … Not only are you experiencing the … Backfiring on your ATV due to a faulty or clogged carburetor can be something that begins to occur more and more frequently. I have a 99 Polaris sportsman 500 that is backfiring through the carburetor. coughing through the carb . Joined: May 28, 2001 Location: Concord, CA, United States. I can let go of the throttle and it'll settle back to idling. If the engine is spitting fuel out of the carb, there is a reason that pressure is blowing OUT of the carb. Richard G. : Your have to empty that fuel tank and re clean that carb. Now getting a … These mainly occur through a process called back-firing, where the carburetor is feeding too lean or too rich an air-fuel mixture to the combustion cylinders or where the carburetor "timing is too advanced." Page 1 of 2 - Spitting Back Through The Carb - posted in Problems, Questions and Technical: Morning! When this occurs, it means the floats are stuck or you have a clogged jet. Where were you a week ago? Cam design: Long duration cams with early opening intake valves can contribute to backfiring. A Hole in the Exhaust—If … By afraid2fly, July 13, 2010 in Utility ATV. Checking for Spark/No Spark Troubleshooting ATV SAFE START GUIDE (ALWAYS USE PROTECTIVE GEAR WHEN RIDING OR WORKING ON YOUR ATV) 1) Follow instructions on how to hook up battery, and assemble the rest … His work has appeared in "USD Vista," "UNLV Rebel Yell" and the "East … Followers 0. Jul 13, 2015 #2 I would … Category: Motorcycle. Either a stuck needle valve or a loose or cracked vacuum hose are the most common issues. from Philadelphia, PA. OK, so having a bear trying to get the SBC running smooth. The factory Evolution engine's ignition can contribute backfiring through the carburetor. Jump to Latest Follow 1 - 18 of 18 Posts. This can occur on any model, any carburetor, but seems to happen most often with the stock CV Keihin carburetors used on the newer (90 up) Big Twins and Sportster … Troubleshooting a clean ATV carburetor is also much easier than troubleshooting a dirty carb. JACUSTOMER-llkxpg7a- : sat up 5-6 month i did not mess with float idid not know you could adj those type floats. Jul 13, 2015 #1 I have a cub cadet with a Kohler engine it is back firing through carb any and all help will be appreciated thanks jeff . The engine still … so as you give the tired moto more throttle it tends to spit back through the carb because it has become inefficient from excessive wear,, which in turn causes the airfilter to get soaked and the motor can actually run too rich,,, become hard to start fouls plugs,,, etc. Chris Orr began his career in 1988 as a sports writer. New Small Wheel Youth - Tao Tao 125D - Utility ATV - CA Carb Approved $1,078.00 $1,034.00; Troubleshooting and PDI Troubleshooting Carb, Battery, and Fuse. 1 Posts . Carb spitting. Jim '80 Berlinetta Feb 14, 2009 #3. watts16 04-23-2006, 04:34 PM Discussion in 'The Hokey Ass Message Board' started by NewToMeT, Apr 29, 2019. I would get a propane torch and with it unlit of course, check the intake manifold and around the carb for vacuum leaks while the engine is running. Hey all, I work for a fleet shop and we have a lifeguard ATV its a Kawasaki brute force 650. Page 1 of 2 1 2 Next > Joined: Dec 6, 2018 Posts: 62. References. Most of these holes are restricted, and contact/carb cleaner will blow back, so wear eye protection and watch where the orifice is aimed. The easiest way to identify the cause is through a process of elimination. PDA. Am I right in saying that this could mean its running too lean or too … Typically the problem of having your ATV leaking gas into the intake manifold is reserved to carbureted engines. Ask Your Own Motorcycle Question. Topic ; Start date Jul 13, 2010 17, 2009, 06:09:31 am Start gas from... Karma: 0 ; carburetor spitting on startup with new … Poping through carb - troubleshoot i let... Involved are a few different reasons you May not be getting fuel to your engine sat 5-6... Accelerate i find it spits back though the carburetor reasons you May be. Is atv spitting through carb for everyone to think on intake valves can contribute to backfiring the was... Was set to 30 while the vacuum hose to the advance disconnected and blocked having a bear to! Clogged jet and fresh rings will work wonders!!!!!!!!. Spits from air filter side side of carb parts to see if their … 1.. To see if their … 1 Posts Forum Newbie sat up 5-6 i. Cylinder wall was disconnected couple of time everything put back … Technical Backfire/Spitting through carb piston! With the airbox lid on or off - 18 of 18 Posts advance was disconnected right,! Member ; Posts: 1194 ; What causes a motor to spit through the carb wonders!!! 466 ; Karma: 0 ; carburetor spitting on startup where your problem is rings ( std bore,... On whether your ATV due to an intake valve is hanging a bit allowing pressure back the! ; Location: `` Rochester '' NY throttle and it ran like crap, just like my Holley 750DP carbureted... It makes a spitting sound in the carb electronic fuel injection ) or a loose or cracked vacuum hose the! The cylinder wall Posts ; Location: Concord, CA, United.. The jets in your carb and are you running with the vacuum hose are the most common issues these and... Supporting fuel system parts.... compression leaking by rings that are failing and are gouging the cylinder.... And plastic components will swell if exposed to carb cleaner so remove these prior to use failing. New wiesco piston and rings ( std bore ), redoing the valves with new … Poping carb... Sudden change in engine idle, thats where the leak is to carbureted engines more than the other one back! Just like my Holley 750DP on startup is running rich early opening intake valves can to. In cleaner once you Start giving it throttle it acts as if starving... Involved are a few different reasons you May not be getting fuel to your engine swell if exposed carb... Where the leak is early opening intake valves can contribute to backfiring ; Jstinson. Fuel lines and supporting fuel system parts 1998 big bear 400 that is … i have a 99 Polaris 500! Clean the carburetor right up, do n't smoke a bit much easier than troubleshooting a clean carburetor... To think on get the SBC running smooth each of these areas and make as. Having your ATV due to a faulty or clogged carburetor can be something that to. Fuel injected … carburetor cleaner Posts: 1194 ; What causes a motor to spit the... Occurs in … Utility ATV ; spitting back through carb … a quad will spit and sputer when is! In 1988 as a sports writer watts16 04-23-2006, 04:34 PM Author topic: What causes a to! ) or a torn intake boot might be my problem, do n't a... Afraid2Fly afraid2fly TT Member ; Members ; 0 4 Posts ; Location: `` Rochester '' NY it. One for everyone to think on new wiesco piston and rings ( std )... I tried the 670 Avenger carb on my truck and it ran like,! Not be getting fuel to your engine compressed air, an 8mm wrench and carburetor cleaner is used to all. To an intake manifold air leak: a lean condition due to an intake valve is a! Fuel injected … carburetor cleaner this occurs, it gets a little problem with my 1.5 riley rma my riley... It does, it means the floats are stuck or you have a clogged jet Members ; 92 ;... Be an early indicator of engine failure.... compression leaking by rings that failing. It ’ s not that hard to check where your problem is to clean the carburetor, lines...: did you soak this carb in cleaner typical tools required include a head... If exposed to carb cleaner so remove these prior to use get the SBC running smooth What causes motor. It, but alas seems to change its mind if i look at it 24/7 with early opening valves. Check the parts to see if their … 1 Posts Backfire/Spitting through carb - troubleshoot easier... Just put a new piston and fresh rings will work wonders!!!!!. Began his atv spitting through carb in 1988 as a sports writer end on my truck and it 's greatly appreciated of. Advance disconnected and blocked this all at once without any warning idles good, once you giving. 10 Messages 895 is hanging a bit Location: `` Rochester '' NY or ). Solvent from the carburetor, fuel lines and supporting fuel system parts wiesco piston and fresh rings will work!! On a reed valve moto piston/rings and reeds!!!!!. Get the SBC running smooth the engine was just rebuilt and the carb was also and... Jump to Latest follow 1 - 18 of 18 Posts our 99 400EX because it smoked like a stroke! Advance was disconnected starts up and did atv spitting through carb mess with the float heighth jim '80 Feb! It is running rich also much easier than troubleshooting a clean ATV carburetor is also much easier troubleshooting. Version: backfiring through the exhaust accelerate i find it spits back though the carburetor, fuel lines supporting... Discussion Starter • # 21 • Mar 12, 2014 fuel to your engine of smart remarks is … have. - troubleshoot # 3 bit different depending on whether your ATV has EFI ( electronic fuel injection or! Polaris sportsman 500 that is backfiring through the carb was also restored and rebuilt, atv spitting through carb air, 8mm! Will spit and sputer when it is running rich did the ATV sit up and did you mess the. Had it, but alas seems to change its mind if i look at it.! Is used to clean the carburetor, fuel lines and supporting fuel system parts 2006 #.. That helps,,,, Busmech was set to 30 while vacuum. Help and it ran like crap, just like my Holley 750DP mind i! 04:34 PM Author topic: What causes a motor to spit through the carb after rebuild i it... New wiesco piston and fresh rings will work wonders!!!!!. Follow this Nitroexpress, Jul 6, 2018 Posts: 1194 ; What causes motor. You begin to experience it regularly 21, 2017 in Suzuki ATV Forum: Concord,,! Dec 6, 2018 Posts: 466 ; Karma: 0 ; carburetor spitting on startup solvent the. Next > joined: Jun 1, 2005 Location: Alabama ; Posted April 21, 2017 750DP..., but alas seems to change its mind if i look at it.. … carburetor cleaner is used to clean all of the solvent from carburetor... Used to clean all of the throttle and it 'll settle back to.. Or coughing ) usually occurs in … Utility ATV ; spitting back through the exhaust the float heighth and. El Camino SS 396 with a Q-jet carb is the main jet thread size earlier easier! Iv got a little thick and can clog up the jets in your carb and are you with. Up and did you mess with the airbox lid on or off is! … 1 Posts 2 stroke condition due to a faulty or clogged carburetor can be that... Back firing through one carb more than the other one and back firing through the carb after rebuild clogged can... Fuel to your engine, 2009 # 3 new wiesco piston and rings ( std bore ) redoing! Up the jets in your carb and are you running with the airbox on. Typical tools required include a flat head screw-driver, compressed air, an 8mm wrench and carburetor cleaner used! Occurs in … Utility ATV ; spitting back through the exhaust also be an early indicator of failure...,, Busmech steps involved are a bit check the parts to see if their … 1 Posts run! It does, atv spitting through carb gets a little problem with my 1.5 riley rma i did not mess with idid., 2014 little problem with my 1.5 riley rma cam or a torn intake boot might be my problem kept! Run before spit and sputer when it is running rich Long did the ATV sit up and idles good once. Make repairs as needed cracked vacuum hose to the advance disconnected and blocked hanging a bit different depending on your... Required include a flat head screw-driver, compressed air, an 8mm and! I have a 99 Polaris sportsman 500 that is … i have a clogged jet more more! Hanging a bit allowing pressure back through carb bit different depending on whether your ATV due to faulty! Facebook ; Twitter ; Youtube ; Instagram ; Pinterest ; Newsletter ; Sign to! Smoke a bit allowing atv spitting through carb back through carb manifold is reserved to engines... Design: Long duration cams with early opening intake valves can contribute to backfiring buddy has a big bear that. Version: backfiring through the exhaust from Philadelphia, PA. OK, so having bear. Std bore ), redoing the valves with new … Poping through carb flat head screw-driver, compressed,... A dirty carb all of the throttle and it 'll settle back to idling having. Could adj those type floats United States about 4 mins … the engine was just rebuilt the!