From jimbo B
I have a 1987 Wellcraft Nova XL 23 with a 260 hp Mercruiser - 350 chevy & high output exhaust. Engine sat idle for 3 years - only 300 hours. When I run it at 3600 rpm at 40 mph no visible oil leak. When I crank it up to 4400-4500 rpm the engine leaks oil quickly, but I can't see...