Re: Mercruiser locked up
alright i will try this i heard puting some transmission fluid in the pistons eats away the rust is this true ??
Uh... NO.
There is no petroleum product that "eats" rust.
The only way to dissolve rust is to use an acid. (but that'll cause other problems worst than rust!)
If you read the thread above, the rust (iron oxide) will act like an abrasive no matter how much oil or diluted oil you dump in and reduce the life of the engine even if you do free it up (until the filter traps the rust)
Your best bet (if you want the engine to last as long as possible) is to remove the drive, follow the above advice, and if it is indeed "rusty" inside, dissemble it and fix the rusty parts and reassemble.
The more you grind rusty cyls against pistons/rings, the more damage you do.....
Cheers,
Rick
......as usual, he's right.