Cylinder Compression Incongruences.-

[Sea Rider]

Cylinder head isn't warped, was measured across l and -- with a machinist straight edge ruler and was found flat as should be before previous installation. I would not even think to torque the cylinder head if it was found warped.

What needs to be resurfaced, shaved, whatever is the crankcase where the cyl gasket and head bolts to. That's the issue with motors that live in salt water, works all day and will never be flushed with fresh water so expect excessive salt, rust, pitting formations very fast on almost the entire motor.

Happy Boating​

 

[racerone]

Fact---Many gaskets are indeed porous!----Nature figures out a way for water to work / seep it's way through.-----Water then evaporates and leaves that white deposit.----Since there is no white next to the gasket , can there be any other explanation ?

 

[Sea Rider]

Fact---Many gaskets are indeed porous!----Nature figures out a way for water to work / seep it's way through.-----Water then evaporates and leaves that white deposit.----Since there is no white next to the gasket , can there be any other explanation ?

I'm plainly in agreement with your post, salt water does nasty things with motors working hard all day long, This particular case it's a combo of pitted, corroded crankcase, porous gasket not sealing well between both mating surfaces, when the gasket is finally removed will find that salt has taken over the entire gasket with the sole exception of the compression ring..

Happy Boating​