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

[stephenspann27]

quote wannabe outboard guy:

One other thing to think about Stephen. Just because it makes compression when doing the compression test, whats not being measured is “blow by”. As was stated earlier in this thread, a leak down test will most likely reveal that it is not holding that cylinder pressure for the complete combustion stroke. That is where the significant power loss comes from. The pressure is leaking past the rings.

Point taken, I think I’ll buy a leakdown guage and do the test.