STIK GUITAR
Cadet
- Joined
- Oct 14, 2007
- Messages
- 11
I recently purchased a boat from a friend and he said it had engine troubles. I pulled the cover off and noticed both head gaskets had been leaking possibly salt water. Tried to turn the crank with ratchet but would not move. I pulled the plugs and several of them were rusty mainly the 3 left cylinders of a 1985 V6 Evinrude 150 XP. I pulled the right head and the top cylinder had a little surface rust on the cylinder. The other two are fine. And as I was attempting to pull the left side cylinder head I noticed it had possibly overheated on that side because it melted a wire plastic covering. I pulled the Left head and noticed all three cylinders were fairly rusted inside. As I was pulling both heads I noticed that the bolts were not torqued very tightly. My friend that I bought the boat from said the motor had been rebuilt. At that point I'm thinking that whoever rebuilt the engine may have forgotten to torque the head bolts to spec. That's why both left and right side head gaskets were leaking. After cleaning the cylinders and spraying WD40 in the cylinders I tried turning the engine over with a ratchet. No movement. My question is could the rings have rusted to the cylinder walls and stopping the engine from turning. Cylinders have no scarring or pitting With the left 3 cylinders overheating could the engine be seized up? Is there anyway to free the pistons so I could replace the heads? This engine has been sitting 1 year possibly with the water in the cylinders even though they were dry when I took the heads off. Is there any product better than WD40 to spray in the cylinders to free up the engine a product like deep creep? Please help! Any information would be helpful. Is this motor history?
