Home › Forum › Ask A Member › Top speed with 18hp Evinrude on 14′ aluminum › Re: Top speed with 18hp Evinrude on 14′ aluminum
The above is correct, I just thought since it had good compression and passed the leak down test it was worth trying some other things. I tore the powerhead all the way down this morning. Not a single gasket was leaking, the burn looked even between the cylinders according to the piston tops and the carbon on the head. No smoking guns as far as getting fuel/air in and out of the motor. The verdict is a like mentioned above, the pistons and rings are scored. The rings are still free on the pistons, and bores are not terrible. The motor has definitely been hot. The crank bearing surfaces are blue from running hot. The crank bearing surface at the top (where the seal was leaking) is trashed. The crank out took out of my original, blue powrehead is actually in better shape than this one. Pictures in the next post.