3.5 hp Tohatsu 2 cycle not pumping water - Page 2 - SailNet Community
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post #11 of 12 Old 09-12-2009
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My old yamaha OB was having the same problem. I replaced the impeller but it still wasn't circulating water. I then checked the thermostat and found that it was corroded shut.

Brian & Marya
S/V Indigo
Pacific Seacraft 34
Hull #281

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post #12 of 12 Old 09-13-2009
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I had the water pump impeller go bad on a Johnson 3.3hp, spin freely on the drive pin on the shaft and later only other problem was a mud dobber built a nest in the water outlet port. I carry a spare impeller for the first problem and a small flexible plastic tube from an aerosol can ( wd40) to poke the mud and critter out should it happen again.

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