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19 foot 2003 polar center console
My son has that boat and the problem is first the fuel fill is in the stern and the vent is on the port side by the stern,when he fills it up with gas and parks his boat in his driveway he keeps the bow higher then the stern, when it's hot out the fuel tank expands and pushes the deck up and cracked the access plate It's not venting, the vent and line are new When he opens the fuel cap all the are comes out So why is she not venting? I would like yo know and do would he Thanks for any help in this Mather
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love to fish 
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#2
05-07-2018, 12:06 AM
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Can you blow through the vent line? Make sure your neighbors aren't watching.
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1985 Wellcraft V-20, Evinrude ETEC 150: SOLD 1979 Marine Trader 44, twin Ford Lehman 120s 2006 Panga 14, Tohatsu 20
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#3
05-07-2018, 12:21 AM
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The laws of physics are absolute. If it's not venting then there is something that is preventing it from doing so. If at all possible run a length of wire through the vent hole to pierce whatever is blocking the line. If that doesn't work and you have a compressor then remove the gas cap so you don't pressurize your gas tank and then use an air gun at the end of the airline to try blowing high pressure air through the vent line. Presuming that it used to vent then my guess is that a bug of some kind has built a home in your line over the winter and it's now blocking it.
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1987 V20 w/1987 150HP Yamaha on a Shoreland'r Trailer 1978 16.5 Airslot w/1996 120HP Force on a Four Winns trailer 1996 V21 w/1993 200HP Mercury on a Shoreline Trailer All towed by a 5.7L Hemi Durango. If God didn't have a purpose for us we wouldn't be here, so Live simply, Love generously, Care deeply, Speak kindly. (Leave the rest to God)  Silence, in the face of evil, is itself evil. Not to speak is to speak, not to act is to act. God will not hold us guiltless.
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#4
05-07-2018, 09:04 AM
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The vent line is not blocked cause it pushed the gas out of it, when the tank expanded, I think the vent line gets blocked by gas when the now is higher than the stern, but that's so the water would run off the back, is there a gas cap that is vented? I would like to know if anyone else had this issue going on I think a vented gas cap would solve the problem but do they make one? I D K Thanks
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love to fish
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#6
05-07-2018, 09:18 PM
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My only guess is it may have a vent that closes when liquid enters it. A vent normally will just let gas come out if you overfill it, but I don't know if new vents may close off when liquid enters them to prevent fuel spillage. All of my past boats would just push gas out the vent if they were overfilled.
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2011 SUNDANCE B20CCR SKIFF, 2011 YAMAHA 90HP 4 STROKE, 2011 KARAVAN SINGLE AXLE ALUMINUM TRAILER, LOWRANCE ELITE-7 HDI, MINN KOTA RIPTIDE TROLLING MOTOR 2000CC HYDRA-SPORT 225+HP EVINRUDE SOLD  AND THE PINK JEEP!!!! R.I.P. http://www.wellcraftv20.com/communit...ad.php?t=11664 
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