Briggs 192412 Hunting Surging
I sure hope you folks can help me out this engine is making me NUTS! It is a Briggs 8 hp 192412-0616 it starts and runs slow perfect. At mid to upper RPMS it surges/hunts the higher the RPM the more hunting / surging.
I have tried New carb, known good Working old carb, Fuel pump hooked up, fuel pump by-passed, New coil, known good Working old coil, new plug, lighter governor spring, stiffer governor spring, original spring in different holes, New fuel filter no fuel filter.
I can rule out fuel delivery and ignition. All of the above had the SAME result surging / hunting at mid to high RPM. The only thing I can think of is the flyweights in the governor are some how messed up.
What am I missing? Any ideas?