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So i got this boat for a decent price and the Mercruiser 165 had only 370 original hours. It ran like a top, compression was great on all cylinders. But the transom allowed a constant large volume of water in which caused the bilge pump to engage constantly when the boat was still. While it was...
I have a Mercruiser 140 that I have rebuilt because of a leaking 2 piece rear main seal and low compression (115-120psi). It had a rough idle, and was burning oil.
The serial # is 2675390. (Serial Range Mercruiser 120/140 1967-1969 2062141 THRU 2791956).
What I did:
Honed the cylinders. (all...