fuel tank vents ?

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8 years 5 months ago #2128 by Frederick Chance
Replied by Frederick Chance on topic fuel tank vents ?
Check to see if your vent fitting as it exits the boat is blocked by a mud dobber nest Mine has been a couple of times Once cleared it works fine again

Brewer 44 Hull #281 Wild Oats Fred Chance

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8 years 5 months ago #2129 by David Irwin
Replied by David Irwin on topic fuel tank vents ?
Thanks you for all the replies, I am blown away.
There is no vent visible on the outside of this boat except the at the stern which I figured was the center fuel tank.
Sounds like the best route for this boat is up into the cockpit coming cuby and out over the fill point.

Thanks again for your efforts

Regards
David Irwin
S/V Comfort hull 122

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8 years 5 months ago #2130 by Frank Fitzpatrick
Replied by Frank Fitzpatrick on topic fuel tank vents ?
Be careful what vent you disconnect. On Just Desserts (ex Menehune) there are two vent fittings going through the transom. One apparently was for the fuel system (currently disconnected and capped on the inside - see previous posts), however the second is the vent for the holding tank.

Judging by what I see now - and I don't know if this is the normal Whitby setup - the fuel tank vent line was copper tubing and went to the port transom vent fitting, whereas the holding tank vent line is rubber hose and goes to the stbd. transom vent fitting. (It appears that the center and stbd fuel tank vent lines joined together at the one transom vent fitting. Just Desserts doesn't have a port tank, so no idea whether the port tank vent normally went to the same fitting or had its own somewhere else.)

[P.S. - if your holding tank vent is not through the transom, please let me know where it is and how well it works. I don't think the transom is the best place for ours - long run and NOT continuously upward - but I don't know where else would be better.]

Hope this helps
Frank

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8 years 5 months ago #2131 by Mark Popiel
Replied by Mark Popiel on topic fuel tank vents ?
Hi

I had the same issue. The reason was that my centre tank was over full and fuel blocked the vent line. On #153 the stbd vent lines goes down to the centre tank, and they vent together.


The solution is to move some fuel from the centre tank until the vent line is no longer blocked


hope it works for you.
mp

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8 years 5 months ago #2132 by Jack Dexter
Replied by Jack Dexter on topic fuel tank vents ?
I had this problem with the fill belching back fuel. I even had it worked on by a professional who re-routed the vent line which helped but did not eliminate the problem. I then discovered that if I used a large funnel (not Baha) and ran the fuel into the funnel the problem went away. I use the largest funnel with the largest hole in the pointy end that will fit in the fill pipe. I can get fuel in more quickly this way, too. If I'm fueling too quickly the fuel simply backs up in the funnel and doesn't go all over the deck.

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8 years 5 months ago #2133 by Dale Kramer
Replied by Dale Kramer on topic fuel tank vents ?
All our fuel vents were re-run to the outside of the winch deck years ago. This gives the vents an almost straight run to the tank.

We have had no problems filling at a full rate.

Dale Kramer
S/V Puffin #169

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