I rebuilt this engine. New crankshaft kit, rods, pistons,rings. New impeller, new wear ring, new spark plugs, new fuel filter. clipped all fuel hose ends and re zip tied. Replaced o rings in fuel selector valve, remove and check fuel pickup tubes. Rebuilt carbs with genuine Mikuni carb kits, checked operation of powervalve motor.
I am at a loss for what is wrong with this engine.
