OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Walk Behind Lawn Mower Frames Question On Scott Bonnar Cylinder Mowers Hello Everyone

Remember that mangled keyway on the crankshaft?



Somehow I managed to jag a black 3hp briggs engine (a freebie - in a very sad state) but with a crankshaft that is in great condition and a perfect replacement for my red engine. Just have to dump the oil and swap them over. It has a 3/4" shaft to boot! Can finally get that 3/4" bonnar clutch with set screws.

Won't end up restoring the black engine, it has too many problems and won't be much use with the damaged crankshaft. I will end up keeping it for parts, maybe cleanup the carb and fuel tank to keep as a backup. The previous owner even tried replacing the diaphragm, it looks newish and is still quite supple, not rigid like an old one. The valves, springs, retainers, camshaft, head, head gasket and flywheel are in good condition too.