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All-Terrain Lawn Tractor Forum :: Technical Forum :: Engine Tech :: Briggs and Stratton
 

 briggs surging and sparking

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Speedfreek241
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PostSubject: briggs surging and sparking   briggs - briggs surging and sparking Icon_minitimeAugust 10th 2013, 9:42 pm
i have a 14.5 hp ohv briggs and it keeps surging at high rpm and wont run at low i now it could be running lean because if i push in the choke a little it runs better. but it is now shooting sparks out of the exhaust every once in a while. what could cause the sparks.
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Doc Sprocket
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PostSubject: Re: briggs surging and sparking   briggs - briggs surging and sparking Icon_minitimeAugust 10th 2013, 9:47 pm
Start with a good carb cleaning. Running better with the choke on is always a sign of a lean mixture. The sparks could be chunks of carbon blowing out, you might have a buildup in the combustion chamber.


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Speedfreek241
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PostSubject: Re: briggs surging and sparking   briggs - briggs surging and sparking Icon_minitimeAugust 10th 2013, 10:01 pm
ok i was thinking it could be carbon passing through the engine
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Stretch44875
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PostSubject: Re: briggs surging and sparking   briggs - briggs surging and sparking Icon_minitimeAugust 10th 2013, 10:20 pm
Throw a new plug in while you are at it, 14.5's we had would foul plugs.


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PostSubject: Re: briggs surging and sparking   briggs - briggs surging and sparking Icon_minitimeSeptember 3rd 2013, 10:43 pm
sparks out the exhaust... oh boy... does the muffler glow at all? it could just be carbon, but ive never seen it happen.. its possible the exhaust valve isnt closing all the way.
check out " Donyboy73 " on youtube. he has a video on it
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PostSubject: Re: briggs surging and sparking   briggs - briggs surging and sparking Icon_minitime
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