My old boat I had to mix oil and gas as well. I would keep it low all winter and then when I went out in Feb I would top the tank off and get a bottle or carb cleaner and pour it in the tank to clean out the carbs. I never and still dont use Stabil. I never had a problem with mine she was just rough to start sometimes when it was super cold out but a few pumps of the bulb and she fired right up.
Shawn



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