Join Date: Feb 2010
Location: Narragansett Bay
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Re: Flushing a saltwater outboard. How long and how often?
My OB is on the dinghy and gets used about once per week. Sometimes more often. I must be a heretic, because I've never flushed an outboard during the season. It does get flushed at the beginning and end of every season, when I change the oil and run her up on the hard. (I rechange the oil that has been sitting all winter) Coincidentally, I pulled an internal zinc last year and could see inside the motor. There was very little scale and the zinc still looked brand new. Motor was 6 years old at that point and I would estimate had five hundred hours on her. 19.9hp Tohatsu
p.s. Never flushed a dozen other OBs I've had over a lifetime either.
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In the harsh marine environment, something is always in need of repair. Margaritas fix everything.