I use Marine Sta-bil but I also use Sea Foam along with it. When I put boat away for the winter I completely fill both tanks and treat heavy with Sta-Bil & Sea Foam. Each springtime I have never had one single issue starting up, and the 175 Johnson runs great. Maybe it's just me having such great luck? I do know this, I will not change my routine seeing as it works great for me. Had the carbs rebuilt when I first bought the boat and they have been fine and clean since, with no issues whatsoever. During the season I use the normal dose required by Sta-Bil and Sea Foam makers with never an issue.
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1976 Wellcraft V-20 Steplift w/1983 175 HP Johnson
1973 Sears 12 ft. V bottom w/1958 3 HP Evinrude
"A boat is a hole in the water, surrounded by wood & fiberglass, into which one pours hard earned money into"
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