Rebuilding 1972 Merc Thunderbolt 800

[bcspanky]

Hi everyone, I'm rebuilding a 1972 Mercury Thunderbult 800 powerhead, need to replace a piston on #3 cyl. There is slight scoring on cyl. wall. Putting it back together now. Should I use a gasket sealer on any of the gaskets, and if yes, what type of sealer is recommended. Thanks Bob

 

[Chris1956]

Re: Rebuilding 1972 Merc Thunderbolt 800

The crankcase gasket is a cork or rubber seal. I use some grease under and over it. The rest of the rubber oring seals get grease. Paper gaskets go on dry.

 

[bcspanky]

Re: Rebuilding 1972 Merc Thunderbolt 800

Ok thank you very much. I'm sure I will be back for more info on putting this back together. Thanks again. Bob