Re: Decarbonizing 1999 Johnson 175 Carb.
Finster-
Carb's wil not get mucked up when they are drained of fuel.
Rather the opposite, when there is fuel remanaining in the carbs (that is untreated) and it evaporates what is left is gum and varnish.
You can not guarantee the stabil get mixed adequatly in your tank and gets to your carbs, I can guarantee I am able to drain all the fuel out.
FWIW I add stabill as well
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