Re: 1987 Johnson 9.9 upper crank seal

[chris-p]

Im failing to see how installing the hood would affect the crank seal? Not saying that may not also be a problem, but perhaps not your immediate issue.

Sounds like an exhaust leak if anything to me.

Also, you know they are made to tune with the hood on? Just slight differences but something to note. Don’t want you chasing a demon that isn’t there. How much RPM difference would you say there is between hood on and hood off? How much adjustment are you doing to compensate?