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Briggs & stratton mod. 406777-0115-E1 engine backfires thru exhaust

Engine starts and runs fine except that it backfires thru the exhaust.

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This is a true tale sign of a valve being out of adjustment or possible burnt or sticking. Most likely its just out of adjustment. Setting them to Book Specifications of: Valve Clearance (cold) IN and EX .005" (0.13 mm) should take care of the problem. Since you said that it runs fine rules out the possibility of a sheared flywheel key, though I have seen one run with it slightly sheared. Thanks; George

Posted on Oct 18, 2013

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SOURCE: I need to know the valve setting for a Briggs

Around .08-.10 clearance at top dead center.

Posted on Jun 30, 2010

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