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Old 10-16-2013
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Re: GS 39 Fuel Tank Vent Line



Just returned from six weeks of cruising in the San Juans. I added fuel twice--about 30-40 gals each time. The first time, the vent seemed to work normally--no backup in the fueling pipe and it took less than ten minutes. I filled the 80-gallon tank to about the 70 gallon level so I don't think any fuel was forced into the vent line. After a month of cruising, I refueled. This time it took almost a half-hour, since the fill pipe repeatedly backed up. No fuel exited the vent line into the overflow bottle. My guess is that sailing and rolling with a fairly full tank, forced fuel up into the vent line and it settled in the lower part of the line, blocking the venting. I know the line needs to run continually uphill to the transom vent fitting but it seems I would have to tear up the cabin sole to get access to the area where the original copper line was installed. Not an option...

Any ideas how I can "purge" the vent hose before refueling?
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