To seal or not to seal?

[HoleSnipe]

I recently was givin a 1968 mercury 50 h.p. 2 stroke 4 cylinder. Problem is that it is in about 500 pieces. I was told that it had an overheating problem but can find nothing to indicate that that is the case. Anyway, my questions are; 1.What should i look for as an indication of overheating? 2.When i finally get ready to put this motor back together, should i use sealer or not. The manual printed by seloc says i should but technicians here in the area tell me to put them on dry. Hope someone can give me the right answer. Thanks for your help.

 

[12Footer]

Re: To seal or not to seal?

Welcome to iboats, HoleSnipe.<br />It all depens on what surfaces you refer to. I would "go by the book" in most cases.

 

[Bob_VT]

Re: To seal or not to seal?

Examine the pistons, the rings, the clyinder walls look for signs of melting and scoring. Look at the paint does it look dis-colored on the head at any location? Look at the impellar? Is it intact? Since the engine is in "500 pieces" look at all the parts.<br /><br />Overheating can occur from lack of water cooling or lack of oil cooling (running wrong pre-mix or straight gas) overly advanced timing can cook a two stroke too.<br /><br />As for sealing I agree with 12Footer and if you do use a sealant use the copper colored silicone.<br /><br />Bob

 

[HoleSnipe]

Re: To seal or not to seal?

Hey guys, thanks for the input. I have examined all the pieces you mentioned and can find nothing wrong with them. In fact you can still see hone marks in the cylinder walls and the pistons with the exception of having some carbon on them are in like new condition. There is no discoloration anywhere. I plan on using the tech manual's directions as far as using sealer. Thanks again for all your input. It is greatly appreciated.