Briggs 31R headache...

StarTech

Lawn Royalty
Well this darn engine is back again. It is the second that misfiring I had in a month. This had a blown head gasket at first. I replaced it and mowed an acre before returning the mower without any further problems. Well I was fool by this one. It was used by the less than 30 minutes and now it is backfiring [I mean out of the carb]. I haven't found a thing out of the things normally causes this. Valves are in time, Flywheel key is intact, ignition coil was replaced with a known good one. No carb leakage, Intake manifold sealed.

In 18 years I never had one to do this without an oblivious reason. Look like I am going have to call this one and return the customer his money. So embarrassing that I can't find the source of the problem. There got to be something that failed but what ? Apparently it is one of those once in a lifetime problems.
 
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