Home › Forum › Ask A Member › 1959 Evinrude Lark 35 hp tear down › Reply To: 1959 Evinrude Lark 35 hp tear down
OK, well it looks like the piston coked up, causing the stuck rings, leading to the melt down… The rings look properly aligned, so I don’t thing the alignment pin for the top set of rings came out…
Perhaps they were using crappy oil…
Hone the cylinder, then remeasure…It won’t be perfect, but will work just fine I’m sure…Don’t “over hone” it to get rid of all the little score marks, use a ball hone to finish up, it will get rid of any little problems and chamfer the ports.
Again, it depends on how perfect you want it…
Another possibility I didn’t consider regarding the piston coking up.
Would the theory be that the rings stuck, then hot compression gasses
got past the rings, over heating the piston?
It must have been making a hell of a rattle before the last guy shut it off!
Thanks all, for the thoughts and suggestions.
Prepare to be boarded!