I have a 70hp 3cyl. Evinrude. I had 120, 120 and then 90 on cyl. 3. I went into rebuild. Broke ring on cyl. 3. honed all cylinders, replaced rings on all pistons, all new gaskets and seals. Turned over, same compression readings. Well, ****. I bought a 70hp Johnson close to the same yer for...