Shiny spot in cylinder

[JasonB]

I'm replacing the head gaskets on my old '76 Johnson v4 85hp due to a water leat to the outside. Now that I am looking at the cylinders, one has a small scuffed looking spot. I can't feel anything with my fingernail. It almost look like the oil is scuffed off showing clean metal, but its not. The engine runs perfect and compression is fine. Should I worry or is it ok? Also, is there any danger in cleaning the pistons/heads with some seafoam spray before re-assembly?<br /><br />

 

[alcan]

Re: Shiny spot in cylinder

Hi Jason<br /> This is just my opinion. I wouldn't worry about the cylender. Sure go ahead and clean the carbon off the tops of the pistons and heads. Your motor has been running 27 yrs now,it may run another 27yrs, who knows? Worry about that cylender when it quits.

 

[NathanY]

Re: Shiny spot in cylinder

If it has good compression and it runs good, I would not worry about it. Seafoam will not hurt it, I would use a good solvent to clean it while disassembled, then use a good lube afterwards.

 

[ob]

Re: Shiny spot in cylinder

Jason , If you feel like cleansing the cylinder walls with solvent don't use any media coarser that a scotch -brite pad(perpedicular to stroke) to dress cylinders with.I agree with the above posts.If your compression looks good and there is no low spot in the area in question you're good to go.Make sure to distribute a decent coat of two cycle oil to cylinder walls on reassembly.You don't want to start em up dry.Good luck.

 

[JasonB]

Re: Shiny spot in cylinder

Thanks for the replies. You confirmed what I was thinking, but this is the first time I've had one apart, so I wanted to check.