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Old 06-23-2019, 10:13 AM   #5
AlaskaProf
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City: Tacoma, WA & Ashland, OR
Vessel Name: boatless, ex: Seeadler
Vessel Model: RAWSON 41
Join Date: Jun 2016
Posts: 2,234
I had this happen last summer. In my case it was a loose clamp, but the big clue was that one of my bilge pumps was cycling periodically. If that isn't your case, it is almost certainly a failed check-valve. Some are external.
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