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**octaneman** · 06-15-2009, 06:27 AM

The timing is slightly advanced, check the flywheel key it maybe partially sheared off. A broken or partially sheared key will make the engine buck, kicks back, backfire.
Replace the key.

06-15-2009, 06:27 AM	#4 (permalink)
octaneman Mentor Home Support, Gearhead Automotive Center Join Date: May 2009 Posts: 560 OS: WINXP	Re: B/S 18hp Blowback through carb The timing is slightly advanced, check the flywheel key it maybe partially sheared off. A broken or partially sheared key will make the engine buck, kicks back, backfire. Replace the key.