HI<br /><br />I have a major bummer going on. It might be long winded, so I will jump right in. About 15 years ago I bought a 1983 Baja 184 ss jet with a cracked block. I took the Block #'s to my auto supply store, and they supplied me with a new short block. I figured i could do the work easily as i always rebuilt my motor in my chevelle for fun. I got everything back working, and enjoyed the boat for 1 year until a valve cracked and shut the motor down. Parts of it went into 2 different cylinders. I left it sit for 2 years, then decided to fix it. I replaced the cylinders, and connecting rods, re-assembled it, and to my dismay--WATER in the oil. I took every part of that motor in for pressure testing--block, heads, intake and exhaust manifolds. Nothing wrong. I proceeded to assemble it another 3 times with the same result. Water in the oil. I now let it sit for 10 years, and was "guaranteed" that the reason i had water was i was using anti-seize on the head bolts. So i took 2 days over the holiday to assemble it using black gasket silicone on the head boalts as advised by a race motor builder--and same problem!<br /><br />Here come the 2 questions--<br /><br />1--any thoughts on the water in the oil?<br /><br />2--what is the difference between a marine 350 and car or truck?<br /><br />I have been reading the gaskets are different, and maybe the cam, and then read that if you use a car engine in a boat, it wont last half as long--how can those 2 things make it wear out that much faster? I understand about how a boat is running at 75% hp most of the time vs a car 20%--but what exact parts are used in a marine engine to offset that fact?<br /><br />Thanks<br />Mark
