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#568086 - 06/09/17 09:08 PM Tank Venting Question
hawkshaw Offline
Admiral

Registered: 01/15/03
Posts: 531
Loc: Tennessee
My brother in law has a brand new Godfrey Poontoon boat. It has an outboard engine (Yamaha 90). The issue is it's pulling a vacuum on the fuel lines and the pump bulb is collapsing. It has the new EPA gas vapor system on it that has two check valves that only let pressure flow out but not in. When the boat uses fuel how is the loss of volume and subsequent negative pressure (vacuum) supposed to be compensated. The fuel cap appear to seal it off tight.

Thanks

Hawk
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The Hawk's Nest
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#568116 - 06/12/17 11:35 AM Re: Tank Venting Question [Re: hawkshaw]
Lowrider78 Offline
Admiral

Registered: 01/31/04
Posts: 1832
Loc: Newton Ks
Loosen the tank cap and see if the problem stops.
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1990 Magnum Mach 1 24' Cuddy Cabin Cruiser, 454, Bravo 1 drive.
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#568118 - 06/12/17 01:10 PM Re: Tank Venting Question [Re: hawkshaw]
captkevin Offline
Admiral

Registered: 10/02/03
Posts: 6988
Loc: Chicago, IL
If he bought it brand new I'd be letting the dealer make any repairs as to not compromise the warranty.
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