79cc predator is backfiring out carb and exhaust won't start

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curtisfox

Well-Known Member
Dec 29, 2008
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minesota
Did some looking found this.
Technician: PK.
Generally it's .0125"



But the exact gap isn't important. It's best to have the coil very tight to the flywheel as this will slightly advance the ignition and you will have better performance at operating speed. I use a folded dollar bill to set the gap. Some people use an index card. I find the dollar is easier to use and sets the gap very tight without rubbing.

Other spot say .030 is the min., for aluminum flywheel, think it was AGK site. So if you have trouble, you may want to give it a little more. Good luck on your venture and future ........Curt
 

Tony01

Well-Known Member
Nov 28, 2012
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sf bay area
Well while you got the flywheel off should just advance it a few. For you I think every five and a half thou is a degree, make a step .030/.036