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Fuel vent belching gas ??? |
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Keeganino 
Grand Poobah 
Joined: October-27-2009 Location: North Carolina Status: Offline Points: 2063 |
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 Topic: Fuel vent belching gas ???Posted: September-22-2011 at 12:30am |
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I have this problem too. One more winter project to add to the list. Easy fix too. Right now I try to never fill up much more than 3/4 tank.
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"working on these old boats may not be cost effective but as it shows its what it brings into your life that matters" -Roger
1973 Skier |
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Hollywood
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Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13514 |
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Posted: September-20-2011 at 2:38pm |
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Just make sure the loop is horizontal, not vertical. You cannot have trap like under your sink, otherwise it will fill with gas or water and no longer vent.
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martin 74
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Joined: January-02-2005 Status: Offline Points: 136 |
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Posted: September-20-2011 at 2:33pm |
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High loop the vent hose Get a longer vent hose - like about 5' longer. From the tank make a big loop and strap it to the underside of the aft deck before going to the through hull. Great idea for many of us with vinyl graphics on the transom. I'm doing this ASAP. I never wanted to redo the graphics back there thinking gas leakage would be a reoccurring problem when trailering and backing down the ramp.... Plus it's much safer with less smell. The way gas prices have been fluctuating I have been filling up more when gas is cheaper. A lot of smart folks on this site. Thanks Rich |
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BuffaloBFN
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Joined: June-24-2007 Location: Gainesville,GA Status: Offline Points: 6094 |
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Posted: September-20-2011 at 2:31pm |
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Actually, it is pressure. HW's point is to add a second vent for air. |
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Hollywood
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Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13514 |
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Posted: September-20-2011 at 1:06pm |
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I didn't read the original post very well. Apparently i've never had my gas tank that full...
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: September-19-2011 at 10:55pm |
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Greg, Yes!!!! It worked for me on my Tique. Joel, there's no vertical room between the tank and the deck to get one of the "check valve air/fuel separators" in there. They need to be installed vertically and there just isn't the room. 
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BuffaloBFN
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Joined: June-24-2007 Location: Gainesville,GA Status: Offline Points: 6094 |
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Posted: September-19-2011 at 9:26pm |
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That's because the gas sloshes to the back and pushes the fuel up the line. Adding the suggested loop gives the gas farther to travel without spilling out. |
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MMT
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Joined: July-12-2010 Location: Northeast IN Status: Offline Points: 74 |
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Posted: September-19-2011 at 7:03pm |
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Its not from pressure building up, it is when i am accelerating. |
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: September-19-2011 at 1:27pm |
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Eric, If I was taking his meds, I wouldn't be able to write at all!! 
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M3Fan
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Joined: October-22-2005 Location: United States Status: Offline Points: 3185 |
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Posted: September-19-2011 at 12:35pm |
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How about adding a fuel/air separator?
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2000 SN GT40 w/99 Graphics/Gel
2016 SN 200 OB 5.3L DI https://forum.fifteenoff.com |
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Hollywood
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Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13514 |
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Posted: September-19-2011 at 12:11pm |
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When it's happening crack open the fill cap, it will stop the siphon/belching.
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eric lavine
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Joined: August-13-2006 Location: United States Status: Offline Points: 13413 |
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Posted: September-19-2011 at 10:30am |
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I thought for a minute 79 was filling in for you Pete
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"the things you own will start to own you"
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MMT
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Posted: September-19-2011 at 10:12am |
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I follow. Lol. Thanks pete i will give that a try.
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eric lavine
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Posted: September-19-2011 at 9:25am |
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Pete, double up on the meds, you've been edgy lately
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"the things you own will start to own you"
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: September-19-2011 at 12:45am |
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Kent isn't following the idea!! 
Kent, High loop the vent hose!! It works!!! Do you want a picture?? Get a longer vent hose - like about 5' longer. From the tank make a big loop and strap it to the underside of the aft deck before going to the through hull. BTW, not overfilling the tank helps too!
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sweet77
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Joined: January-06-2011 Location: Florida Status: Offline Points: 666 |
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Posted: September-19-2011 at 12:02am |
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i just don't fill my boat completely up. i filled up one night and the next day my house and garage smelled like gas. it was horrible so i siphoned the excess fuel out never had anymore trouble
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Luchog
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Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
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Posted: September-18-2011 at 10:59pm |
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I'm not sure I follow your idea.
And then I though on the one way valve i suggested earlier, that would work for not letting water in, not fuel out, so dischard that idea. |
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MMT
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Joined: July-12-2010 Location: Northeast IN Status: Offline Points: 74 |
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Posted: September-18-2011 at 9:53pm |
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I can't really high loop it. The glass is directly above it now. I was wondering if I could find some sort of petroleum resistant foam to pack in the hose, in a spot where it couldn't get back into the tank.
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Luchog
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Posted: September-18-2011 at 9:45pm |
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Mine does the same thing, ---wrong idea/bad suggestion edited for future readers----
add a high loop on the hose to the vent |
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MMT
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Joined: July-12-2010 Location: Northeast IN Status: Offline Points: 74 |
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Posted: September-18-2011 at 9:27pm |
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I bought my Tique in pieces 81 Tique and finally got it in the water about a month ago. Absolutely no issues at all, except that when it's full of gas the vent belches gas out on the back of the hull into the lake.
Is there supposed to be some sort of baffle or valve in the vent hose to prevent this from happening? Thanks, Kent |
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MMT wrote: