I’m on the fence with ethanol. I hadn’t run any E-free in my Ski Nautiques in about 6 years.... knock on wood, no problems. In my Honda outboard I seem to run e free one year, ethanol the next. I hadn’t really noticed a difference in it, carb’s need gone through every 366 days no matter what. You aren’t running high enough compression for anything other than 87 oct.
And to summarize myself on about the 3rd comment on this thread about a month ago... most guys will disagree with me but don’t bother rebuilding carb’s. Spend the $700 or so, buy a brand new one calibrated for a Ford, bolt it on and ski within the hour. The money spent upfront will save money, time, and aggravation later. Season is too short, Go Ski!!!