1960 Johnson 75 ho

[61mysteryboat]

I was just wondering what normal compression is for this motor. I just overhauled the engine and ran a compression check. It's only about 75 lb on all cylinders. I don't know if it makes a difference but it's below freezing up here today and the engine didn't turn over real fast.

 

[Chris1956]

That is probably OK. They were not high compression engines, just bulletproof. Are all the cylinders about equal?

 

[61mysteryboat]

All within a pound or two.

 

[racerone]

These motors use a shocking amount of fuel too.