Re: Evinrude 5520 5.5 hp pistons

[DAN ANDERSON]

Your old motor had three ring pistons in it. That was the style then. Later 6hp motors picked up the two ring piston and still later 6hp motors had pressure back rings. The top ring was a wedge shaped ring. All three motors had the same bore and could use each type pistons. I preferred to use two of the same type in any one engine, others may disagree on this site. It should be easy enough to find a three ring piston for your original engine. I may have an extra somewhere in all my stuff.

Dan in TN