Re: Top speed with 18hp Evinrude on 14′ aluminum

[stephenspann27]

I replaced the top crank seal today and tested the motor. No change, other than I had to re-adjust the idle speed now that the air leak at the seal is gone. With two new spark plugs I got the same results as before. The top plug looks like it’s never been touched by fuel, and the bottom plug is dark and sooted. With a single carb motor, with great spark on each cylinder I"m trying to think what could cause this. When I run the motor in a barrel I get a ton of milkey oil in the barrell. I also have some oil soot leaking at the powerhead/mid section gasket. The gaskets are new and the bolts are tight. I"m wondering if water is getting in at the base gasket maybe..