Quote:
Originally Posted by Rubberguy
The presence of ethanol in gas has caused some interesting problems, especially for older carburetors. Because ethanol is a polar molecule, it reacts with the rubber components (usually Nitrile rubber) and causes it to swell abnormally. There is a new sta-bil that is being offered specifically for ethanol containing marine engines. It's fairly expensive, but places like Dave's Motorboat Shoppe offer it.
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I have also seen Marine Stabile (blue in color, not to be confused with the red formula) sold at VIP Auto Parts stores and AutoZone stores.