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Old 04-02-2011, 12:52 PM   #11
camojfk
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Angry Re: backfire

whatever i did i made it worst. i changed the exhasut gaskets and all it does is backfire put the old ones back on and same thing.
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Old 04-02-2011, 02:33 PM   #12
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Default Re: backfire

Is your first statement still correct in that you release the accelerator and as you cruise to a halt just before you stop you backfire?

If your microswitch is set correctly the plug would stop sparking as soon as you released the throttle so I wonder if the source of the ignition is carbon in the exhaust pipe. I would be tempted to remove the exhaust pipe and go for a ride. It will be hellishly noisy but if it cures the problem then maybe the solution is to bbq the pipe as well as the muffler.

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Old 04-02-2011, 02:41 PM   #13
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Default Re: backfire

no it does it all the time now,something changed. i ll take the muffler off and give that a try
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Old 04-02-2011, 04:20 PM   #14
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Default Re: backfire

Actually what I was suggesting was to remove the exhaust pipe not the muffler. You can then make sure that the gasket between the cylinder and the pipe is OK
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Old 04-03-2011, 08:20 PM   #15
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Default Re: backfire

the spark plug was covered in carbon. took the pipe off and all it did was shoot flames out
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Old 04-04-2011, 09:35 AM   #16
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Default Re: backfire

It will shoot flames out as the exhaust port opens before combustion is complete. This is why if the pipe has a hot spot or the gasket is broken or if there is an inordinate amount of carbon in there it will backfire. So with the pipe removed did it backfire?
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Old 04-11-2011, 09:09 AM   #17
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Smile Re: backfire

i changed the carb thinking that would help, and it did to some point. i bent the mirco swilcth. i ajusted the bolt all the way in and bent the tab untill i got it where i needed it so the spark stays longer after i release the pedal. it seems to be working much better



new carb @ everythingcarts 99.99 free shipping and no tax
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Old 04-11-2011, 11:01 AM   #18
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Default Re: backfire

Hay Evansville Il. i'm over here in Lebanon Il. was just looking at you photos and wondered if your throttle cable is secured to the bracket jam nut each side.Just a thought but if the cable is moving in and out you could be chasing your problem. DON'T KNOW
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