Small Engine Troubleshooting Problems? Ask a Mechanic Now.
This is Briggs single cylinder OHV engine, 31P777-0299-E1. I would want to check the valve clearance. On this engine the intake and exhaust should be .004 to .006 inch
As for the engine shutting off when brake is released or deck engaged, is usually the brake interlock switch.
I don't get your email address. Site is only the only one that has it.
Have the valves been checked?
I see question is still open, did you find solution?