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Ventless Gas Cap
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MMT Pro Member
Joined: Wed Aug 07, 2013 7:55 pm Posts: 221 
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 Ventless Gas CapPicked up a new tank today and noticed it has a ventless gas cap. Anyone had any problems with these?
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| Mon Jan 02, 2017 7:59 pm |
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MMT 1000 Club  Joined: Thu Nov 04, 2010 7:38 am Posts: 4323 Location: Cut Off, La.
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Re: Ventless Gas Cap Yeah they suck. Take the little white ball out from under the cap.
I did that and even drilled a hole where the ball was. They aren't ventless. Just builds up too much pressure before venting _________________ Refurbishing a Prodrive |
| Mon Jan 02, 2017 8:06 pm |
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MMT F.E.  Joined: Tue Aug 26, 2014 10:36 am Posts: 822 Location: Jefferson TX
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Re: Ventless Gas Cap Lets air in and not out, use a 12 gal on my merc 150 for 3 yrs now and no problems.
_________________ SEAARK FX 2472 CC Merc 150HP 4Stroke(CypressCadillac) Uncle J Custom - 19x54 CC Skiff w/40XD GTR |
| Tue Jan 03, 2017 10:09 am |
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MMT F.E. Joined: Tue Aug 26, 2014 10:36 am Posts: 822 Location: Jefferson TX
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Re: Ventless Gas Cap Lets air in and not out, use a 12 gal on my merc 150 for 3 yrs now and no problems.
_________________ SEAARK FX 2472 CC Merc 150HP 4Stroke(CypressCadillac) Uncle J Custom - 19x54 CC Skiff w/40XD GTR |
| Tue Jan 03, 2017 10:09 am |
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MMT Addict  Joined: Mon Jan 19, 2009 5:22 am Posts: 535 Location: New Orleans
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Re: Ventless Gas Cap I hear you can still buy old style replacement caps.
_________________ 17' CAT 5 with 37 GTR |
| Tue Jan 03, 2017 4:31 pm |
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MMT Pro Member
Joined: Sun Feb 05, 2012 3:35 pm Posts: 162 Location: Muskogee, Ok
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Re: Ventless Gas Cap http://www.attwoodmarine.com/store/prod ... mand-valve
Had to put one of these on 40 hp Yamaha outboard I have with ventless tank. |
| Tue Jan 03, 2017 7:57 pm |
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MMT F.E.  Joined: Thu Apr 18, 2013 5:52 pm Posts: 870 Location: SW LA
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Re: Ventless Gas Cap Would drilling holes between the threads where the cap screws on work?
Sent from my iPad using Tapatalk |
| Thu Jan 05, 2017 5:07 pm |
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MMT 1000 Club
Joined: Sun Oct 24, 2010 7:19 pm Posts: 1103
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Re: Ventless Gas Cap |
| Thu Jan 05, 2017 6:34 pm |
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MMT Addict Joined: Mon Jan 19, 2009 5:22 am Posts: 535 Location: New Orleans
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Re: Ventless Gas Cap _________________ 17' CAT 5 with 37 GTR |
| Fri Jan 06, 2017 1:02 pm |
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