Any of you folks ever ruin an outboard because of stuck rings or carbon
under the rings?

Was it from long hours of low speed trolling or high speed use?

I tend to run my engine at 40:1 with OMC XD30 and I was wondering if
perhaps that is bad for my rings compared to 50:1 mix. I run the engine
pretty hard pulling a skier often, amounting to about 50% of the engine
hours. I can turn the engine easy enough with my hands on the flywheel
and the compression is balanced at about 120 each. I am really just
trying to get the most life out of this motor and not hurt it.

The motor is a 1981 3cyl 70hp Evinrude.

Anyone want to share "wish I wouldn't have done that" stories?

TNX guys