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[ 7 posts ] |
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Diaphragm pump going bad/leaking
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nuccifish06
MMT Pro Member
Joined: Tue Sep 16, 2014 6:36 pm Posts: 108 Location: Sunrise, FL
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Diaphragm pump going bad/leaking
I've got a 23hp van and I'm on my 3rd diaphragm pump in 4 years. They keep pumping fuel out the little hole on the top and motor runs itself out of fuel. Is this a common problem due to ethanol fuels deteriorating the inside or am I blowing a leak in it priming the line with an electric fuel pump I installed because my tank is located in the front. The pump is only a 2-4 pump. Couldn't find anything on this in a search.
_________________ 1438 Jon / 23hp MBLT
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Tue Jan 09, 2018 8:36 am |
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CypressCritter
MMT F.E.
Joined: Tue Aug 26, 2014 10:36 am Posts: 822 Location: Jefferson TX
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Re: Diaphragm pump going bad/leaking
Either do away with diaphragm pump or electric one. No need for both. I have never run an electric fuel pump and the only fuel problems have been air leak and a primer bulb leak. Your electric pump might be what is causing diaphragm to start leaking, if your tank is not vented and it swells up it is putting pressure on that diaphragm also.
_________________ SEAARK FX 2472 CC Merc 150HP 4Stroke(CypressCadillac) Uncle J Custom - 19x54 CC Skiff w/40XD GTR
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Tue Jan 09, 2018 9:17 am |
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nuccifish06
MMT Pro Member
Joined: Tue Sep 16, 2014 6:36 pm Posts: 108 Location: Sunrise, FL
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Re: Diaphragm pump going bad/leaking
Got it. Thanks. Do you think I can keep the electric pump just to initially prime the line still since I removed the primer ball?
_________________ 1438 Jon / 23hp MBLT
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Tue Jan 09, 2018 9:31 am |
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4Cody4
MMT 1000 Club
Joined: Thu Mar 31, 2011 11:21 am Posts: 2530 Location: Land of 10,000 Lakes
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Re: Diaphragm pump going bad/leaking
I’d rather have the primer ball than the electric pump myself.
Sent from my iPhone using Tapatalk
_________________ "Two people in this world wear helmets, and that's dare devils and pussies." - Willie Braun
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Tue Jan 09, 2018 9:52 am |
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Russ
MMT 1000 Club
Joined: Mon Dec 31, 2012 11:07 pm Posts: 4820 Location: West Monroe, LA
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Re: Diaphragm pump going bad/leaking
use the primer bulb to prime, and either the electric or the diaphragm pump to feed the engine. I use the Facet solid state e pump (posi flow, used to be the cube).
#CFFITR #TheGhostBoat #whoneedsphysicsihaveamudmotor
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Tue Jan 09, 2018 9:55 am |
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MaXXis85
MMT Elite Member
Joined: Wed Jan 14, 2009 7:23 am Posts: 6233 Location: Tarkington, TX
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Re: Diaphragm pump going bad/leaking
primer bulb and diaphragm pump. E pumps are not needed and are bandaids.
_________________ Bayou Surface Drive 337-351-0362 Tarkington, TX 77327
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Tue Jan 09, 2018 9:59 am |
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nuccifish06
MMT Pro Member
Joined: Tue Sep 16, 2014 6:36 pm Posts: 108 Location: Sunrise, FL
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Re: Diaphragm pump going bad/leaking
OK. Thanks again for the advise!
_________________ 1438 Jon / 23hp MBLT
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Tue Jan 09, 2018 11:19 am |
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