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Need help on misfire

Posted by the_0utsider (My Page) on
Sat, Mar 2, 13 at 22:36

anyone have a motor that "misfires" like mine?
If i open the throttle, it boggs down and dies.
here it is - http://www.youtube.com/watch?v=NFo4RDzbzo4


Follow-Up Postings:

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RE: Need help on misfire

Does it run the same w/ the point box cover off? That cover loose and dancing around can't be a good thing...


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RE: Need help on misfire

Oh yes. It does this with the cover on or off. taking it apart i just noticed that the mount for the ignition coil is movable side to side unlike typical current motors.


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RE: Need help on misfire

  • Posted by baymee LehighValleyPA (My Page) on
    Sun, Mar 3, 13 at 11:07

That's for the timing. How about a glowing carbon buildup under the head causing a second spark source? Did you remove the head?


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RE: Need help on misfire

i opened it before running and after recoding the video. i cleaned it before i ran it and after there is very little.


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RE: Need help on misfire

It's actually simple to properly post the link so everyone can just click on it. Look under the big message field for the 'Optional Link URL' field and drop it there.

Here is a link that might be useful: video


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RE: Need help on misfire

Problem solved... turns out the coil is on backwards but somehow it ran....
Also, when i found this motor, it ran fine occassionally. Replacing the coil eliminated random days with no spark.
It all comes down to how did it run when the coil was on backwards?

Thanks !


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RE: Need help on misfire

Maybe it was running backwards? :)


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RE: Need help on misfire

some tuning later and here is the final product:

Here is a link that might be useful: briggs


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