On Sat, 16 Feb 2019 08:45:57 -0800 (PST), Tim
wrote:


On Sat, 16 Feb 2019 06:07:37 -0800 (PST), Tim
wrote:
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Do you have a local airport? They all sell something called 100LL
(One hundred octane, low lead). It's pricey but you probably don't
need huge amounts.

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Seeing my Mercury 115 is a 1977, I’d think I’d like it. But carrying 40 gal might shuck a wallet quickly. Lol!

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Yeah, those bigger outboards can run through 40 gallons in no time at
all. I assume it's a 2 stroke? If so they seem to be a little less
prone to having the carb gum up. In my experience the problems arise
when the gas and motor sit around for a while. You could keep a
smaller tank of 100LL on hand and run the motor on it for a few
minutes before shutting down. That would help to avoid carb problems.
The other big issue with ethanol fuel is phase separation in the tank
which results in an accumulation of water. The judicious use of
Stabil and/or SeaFoam can help with that but I'd also add a good water
separating filter like a Racor between your fuel tank and the motor.
People are even doing this with dinghy motors.