Per my other thread the lake test was mostly successful. No overheating (maybe got a hair past 150?) and had plenty of power (we didn't go all the way to the redline, too much traffic). I did run some Motor Medic Lead Substitute just to be safe.
That said, fuel wise, I'm in a pickle. Bringing this back to the original question of this particular thread, the fuel I'm supposed to run isn't super obtainable. Lead substitutes are hardly stocked (heck, the LAPS I bought from didn't even know they had it stocked- somebody had asked 20 mins earlier and only one old bottle on the shelf) and while the local lake 30 mins away has a couple 90 octane E0 stations nearby, the lake is too small for this boat to be worth using (only area where wake is allowed is 1.25x0.5mile). My town has a really nice Ohio river boat ramp but literally nobody in town has ethanol free (it's all E10 or E15)... and an hour of driving just to fill my boat's 20-25 gallon tank (it puked out the vent at around 17.5 with no more than 4 already in but I thought was supposed to be 25???) seems like a waste of time and gas.
From what I can tell the fuel lines/tank are decently clean... but my fear is that ethanol will wreck the mechanical fuel pump (which I believe is factory) and I have yet confirm if such can be rebuilt to handle ethanol (from what I can find the mercruiser fuel pump may be a rebadged/modified Carter pump like Ford used on automotive 302s???). Let alone issues with ethanol fuel sitting in carb bowls (but that's a winterization issue and can be worked around- I run E10 in my carbed truck without issues).
Last thing I want is to be dead in the water with a dead fuel pump. But I also would like to be able to use fuel that doesn't require an expedition to obtain.