hey guys im new here and i just bought a boat with a 1986 mercruiser 3.0 i/l 4 and there was water in the oil. we tore the motor down completely and found no cracks so far, possible leaking headgasket. but the #1,#2, and #3 cylinders were bored .030 over and the #4 cylinder was bored to .040 over. it ran fine with a bit of knocking on the #3 piston which was cracked. does anyone know what the standard bore on this motor is? and has anyone heard of boring 1 cylinder .010 more than others?
SledHed
SledHed
