Re: Evinrude 20. Is this noise a problem?

[frankr]

You have to realize that is not a car. It has all roller bearings, not oil cushioned plain bearings as a car does. It also has a shocking amount of piston taper, compared to a car. Shocking because if you were to pull the head and try to move the top of the pistons back and forth, they will due to the taper. All this sounds like a bucket of bolts if you are not used to it. On the other hand, outboards are built to run at 5000 or more RPM all day long. Don’t try that with a car.

One more thing, a two-stroke always has fresh, cool, clean oil. A four stroke uses the same hot, dirty oil over and over and over again.