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I have a 1988 searay with a 3.0 merc and a 17 pitch prop. At full throttle I only turn 3400 to 3600 rpms @ about 30 mph. I know I should be around 4200 to 4600 rpms. Any ideas on what could be going on.
I have a water leak coming from between the block and the exhaust manifold. what would cause this and is it going to hurt it running? This motor is on a 1988 searay.The motor runs great doesnt over heating or anything. Also I ran it on a water hose for abot 30 min and I dont have water in the oil.