One possibility is the vent line. Mine ran from a transom mounted vent and had a long, flattish run before reaching the tank.
It turns out some water would get in the line now and then. In rougher seas, the water would occasionally settle in a flat spot and block the line completely, preventing the fuel pump from pulling from the tank. I moved the vent much closer to the tank, with a vertical orientation, which solved the problem. I had a similar situation with the vent for the holding tank. When it clogged, pumping the head would create leaks in the system. No fun at all. Jack Brennan Former C&C 25 Shanachie, 1974 Bristol 30 Tierra Verde, Fl. Sent from my Samsung Galaxy Tab®|PRO -------- Original message -------- From: Petar Horvatic via CnC-List <cnc-list@cnc-list.com> Date:07/06/2015 9:09 AM (GMT-05:00) To: cnc-list@cnc-list.com Cc: Petar Horvatic <phorv...@gmail.com> Subject: Stus-List westerbeake sucking in air on a half tank Anyone has an idea why this happened twice in a row. Two trips to Block island this year and at about the same spot, right where seas get a little lumpy, and on about half full tank, diesel sucks in air and dies. First time was pounding into 20-kts (not a good way to travel), second time with no wind but large confused seas. The first time I sailed and dropped a hook before bleeding the injectors. Second time I added 5 gal jerry can and after bleeding injectors in 6 foot swell got her started without a problem. Ran fine after that in same conditions. I guess I should check to make sure fuel gauge is calibrated, although I’ve been using it the past 3-4 years. Petar Horvatic Sundowner 76 C&C 38MkII Newport, RI
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