I can speak from experience what happens to ethanol fuel when you don't use stabilizer and don't run the carbs empty. In about six months, the gas turns to a gel that resembles Vasoline mixed with flour that takes many cleanings to finally get the tiny clumps of particulate out of the system. It hides out everywhere! So now any gas engine that is not used or refueled at least weekly, gets stabilized immediately.
My 2 stroke dinghy engine gets the fuel bowl run empty at the end of every cruise.
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