A friend of mine got a 35-foot Chris-Craft for next to nothing, the boat ran in the last 2 years. We are pretty sure it is seized from sitting . He has put mmo in the cylinders a few times in the last month and it has been sitting but will not spin over. Does anybody have a suggestion on what else to use, we were wondering if ATF and acetone would do damage to the Rings or Pistons or cylinders. His next step is pulling the heads, he says he can get a rebuild kit for very very cheap. He has tried using a breaker bar to spin it . Any suggestions? thanks