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TOPIC: 4788 Aft Head

4788 Aft Head 06 Aug 2017 23:10 #1

  • adavis
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The aft head in my 4788 is not pumping water in. The pump pumps the water out just fine, but all I get is a trickle in. I know there is a relay that open the intake, but I don't know where it is or where to buy a new one if I need it. The boat is a 1994. Does anyone know where the relay is and where to buy one.

Thanks,
Al

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4788 Aft Head 07 Aug 2017 00:21 #2

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What type of head? Par?

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1989 26' then 1994 32' now 2001 39'

4788 Aft Head 07 Aug 2017 00:45 #3

  • mmichellich
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Did you recently replace the original poop shooter? If you did you likely installed the new one upside down. The maserator/pump has clearly marked in and out connections. I learned the hard way.

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Started boating 1965
Bayliners owned: 26 Victoria, 28 Bounty, 32, 38, and 47 since 1996

4788 Aft Head 07 Aug 2017 01:28 #4

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Thanks, but the head is a Jabsco and has worked fine for years. I looked under the sink and there is no solenoid. Just a metal loop that goes above the water line. It just seems like I can't get it to prime. I do have a repair kit and will look at the impeller next.

Al

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4788 Aft Head 07 Aug 2017 01:45 #5

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Sounds like the vented loop clogged at the tip or if it has a solinod it is not closing

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Mark
USCG OUPV
1990 4588
Carlsbad, CA

4788 Aft Head 07 Aug 2017 04:23 #6

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adavis wrote: The aft head in my 4788 is not pumping water in. The pump pumps the water out just fine, but all I get is a trickle in. I know there is a relay that open the intake, but I don't know where it is or where to buy a new one if I need it. The boat is a 1994. Does anyone know where the relay is and where to buy one.

Thanks,
Al


is the thru hull valve open, behind the sliders in the hallway? On our boat once wife grabbed vacuum hose out of there and accidently closed a valve.

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Started boating 1965
Bayliners owned: 26 Victoria, 28 Bounty, 32, 38, and 47 since 1996
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