thanks to this forum i was able to identify the problem with my boat engine. i found a hole in a piston and was going to get a new or remanufactured engine. i was told it would be better to have my engine rebuilt and it would save me alot of money. i have no idea what a rebuild of my engine would cost. i have a 1985 mercruiser 4 cyl, 3.0 liter , 140 hp, 181 c.i. engine. any suggestions?????