Re: Evinrude 5520 5.5 hp pistons

[Don]

I agree with Dan, use two of the same style pistons.
Where is the damage on the piston skirt? If it is on the intake side, you are less likely to lose primary compression through the exhaust ports. Toss the piston if the skirt is damaged on the exhaust side of the skirt. I guess it all comes down to the extent of skirt damage, and how much time and money you want to put into this project.
Post some pictures of the damaged piston for more opinions.
Like Dan says, you should be able to find a decent usable piston for this engine easily.