Trunk Monkey
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I just spent hours pulling and cleaning the carb of my back up generator. The problem as I understand it is that ethanol separates from the gasoline and that the etoh absorbs 29% more water than non- ethanol gas. Ive found that non-ethanol mix stays good in my chainsaw so I found a place in town that sells non-ethanol gas. Cost today was $4 a gal. I’ll be using it in generators and lawnmowers from now on.
I had a kohler engine in my lawnmower, every spring it took a while to get going, but after mowing 2-3 times wasn't a problem. That engine blew up and replaced with a brigs and stratton. Left for 2 months with gas in it and took too much effort to get started again (brand new, only run 20-30 minutes before storing).
This, and a chipper that got stored for years, and had to have the carb tore apart and a new jet installed to run again...
I installed shut off valves on them. If it's near the end of the season, done with it, flip the shut off valve and run the carb bowl dry. It takes an extra minute or two, and been working fine so far. The valves aren't large, but I don't think I'd want one on a chainsaw.