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Carburetor backfires - Motorcycles

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Carburetor can't backfire... the engine can though... need a lot more info like what kind of motorcycle

Posted on Nov 27, 2013

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Posted on Jan 02, 2017

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Why does my 318 lawn mower back fires


Charlene: According to https://www.briggsandstratton.com/us/en/support/faqs/engine-backfire-afterfire " What causes a small engine backfire & how do I fix it? Backfire typically occurs when the engine is decelerated rapidly.

Common Causes of Backfire:

  • Lowering engine speed too fast
  • Gasoline, which contains higher blends of alcohol
  • Carburetor adjustment set too lean
  • Muffler construction can induce backfire
  • Higher than normal engine temperatures
  • Some carburetors can induce backfire due to the sensitivity of internal transitional passages
    (This condition cannot be corrected).

Possible Fixes for Backfiring:

  • Lower engine speed slowly
  • Follow small engine fuel recommendations and/or switch to brands with low or no alcohol
  • Adjust carburetor for optimum performance
  • Inquire with equipment manufacturer about increasing air volume to decrease engine temperature"
Charlene: I hope that helps! :)
Charlen

May 28, 2015 | John Deere Garden

1 Answer

Backfire when starting


Cars haven't had carburetors since 1985 some 29 years

To backfire thru the intake, you can't use the car,has to be
a timing or valve problem,probably a mechanical failure

Mar 24, 2014 | 1999 Chevrolet Malibu

1 Answer

Carburetor backfires


check HT leads firing order as you will probably have 2 wires crossed. ensure that the HT leads do not touch each other. Have a compression test done to check for valve problem

Dec 19, 2013 | 1986 Ford Mustang

1 Answer

Cub cudet 31p7770299e1 briggs stratton engine


only thing left is valve seat is loose and poping loose at a certain rpm causing backfire threw carb has to be intake valve

Apr 23, 2013 | Cub Cadet Garden

1 Answer

What causes backfire from the carborator


  • Some carburetors can induce backfire due to the sensitivity of internal transitional passages. This condition cannot be corrected. Also the carburetor adjustments could be set too lean.

Apr 12, 2013 | Moroso Chevrolet 305 Small Block 63505...

1 Answer

Backfiring won't start bought new coils still won't start and pops backfires


Do you have a carburetor? If you do, it is set too rich. Also, your timing appears off. If you do have a carburetor, adjust the setting to the left a couple of turns. This will lean out the gas mixture. If you have a fuel injector, have the system checked. The air filter could be clogged and the fuel injector could be misaligned.

A backfire is often created because the timing is off, forcing the spark plugs to fire before the pistons get to the top of its power stroke, causing the mixture to burn prematurely.

Feb 22, 2013 | Motorcycles

1 Answer

My 86 suzuki intruder 700 backfires out the exhaust at idle. and makes a tapping noise. i already did a valve adjustment an new plugs


It could be the speed of one carburetor is faster than the other. This causes the backfiring as well as forces one cylinder to run lean which causes the tapping noise. You will experience an identical tapping or "ping" when you get close to empty on main fuel and need to switch to reserve. Most likely you or the previous owner unknowingly adjusted the speed of the rear carburetor down because of the high stock idle not realizing the front carburetor needs to be slowed down to match. While running simply turn the idle adjust screw clockwise on the rear carburetor until the idle smooths out and the backfiring/tapping stops.

Sep 20, 2010 | 1995 Suzuki VS 800 Intruder

1 Answer

Carburetor backfire 97 dyna lowrider


backfire can be caused by a too lean idle screw adjustment on the carburetor.

Aug 26, 2010 | Harley Davidson FXDL Dyna Low Rider...

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