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02-04-2021, 01:37 PM
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#1
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Senior Member
City: Sequim Wa
Vessel Name: Michelle
Vessel Model: 1977 Schucker 436
Join Date: Apr 2019
Posts: 268
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Fresh Water supply pump intermittent
Howdy, my fresh water pump fails to come on from time to time. I found one suspect power connection and repaired but in the past if I just gave the pump a wrap with a screw driver it would run properly for months and then fail again. The vibration could be enough to have woken up the poor connection or might it be an internal failure.?
My question is if it fails in a similar fashion after repairing the one connection today, is there maintenance of any kind besides impeller replacement?
Pump is a Shurflo 2088-423-344. Thanks
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02-04-2021, 01:50 PM
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#2
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Senior Member
City: Lynden
Vessel Name: Joint Venture
Vessel Model: 1978 GlasPly 2800 mid cabin
Join Date: Nov 2020
Posts: 191
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Looking at the pump and seeing it has a pressure switch mounted on it I suspect dirty or worn switch contacts. Do you have a pressure tank accumulator installed? Pump should run up to 55psi before shutdown and come on at 25psi.
https://www.pumpagents.com/ShurfloPu...8-423-344.html
__________________
"Joint Venture" 1978 midcabin 2800, twin 2017 Vortec roller cam "bullet proof" 383/6.3L full roller 350hp engines
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02-04-2021, 02:01 PM
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#3
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Guru
City: Fort Myers, FL... Summers in the Great Lakes
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
Posts: 11,070
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Well of course you're having problems, your boat is pointing straight up (your avatar is 90 degrees off).
By a spare. When it bothers you enough, swap it out.
Ted
__________________
Blog: mvslowhand.com
I'm tired of fast moves, I've got a slow groove, on my mind.....
I want to spend some time, Not come and go in a heated rush.....
"Slow Hand" by The Pointer Sisters
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02-04-2021, 03:02 PM
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#4
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Senior Member
City: Sequim Wa
Vessel Name: Michelle
Vessel Model: 1977 Schucker 436
Join Date: Apr 2019
Posts: 268
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Thanks for the input.
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02-04-2021, 04:54 PM
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#5
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Guru
City: Carbondale, IL
Vessel Name: Sold boat
Vessel Model: DeFever 59 PH
Join Date: Jun 2019
Posts: 631
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Buy a 120VAC water pump and run it off your inverter.
__________________
Captain F. Lee - R.P.E.
USCG 200 GT Master
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02-04-2021, 06:47 PM
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#6
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Senior Member
City: Sequim Wa
Vessel Name: Michelle
Vessel Model: 1977 Schucker 436
Join Date: Apr 2019
Posts: 268
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I don’t have an inverter.
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02-04-2021, 08:12 PM
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#7
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Guru
City: Gibsons, B.C., Canada
Vessel Name: Island Pride
Vessel Model: Palmer 32'
Join Date: Oct 2007
Posts: 3,947
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I will wager the switch is a snap switch OR *Micro switch*. They are not terribly long lasting in this application. The contacts will burn causing what you are experiencing.
It is the turning off that burns the contacts.
A new switch should be available from the mfgr. through the local chandlery.
Buy two and keep a spare.
THe pages posted above show the parts available and the switch is part of it although it looks like the sw. may not be available by itself. ASK if it is available by itself.
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02-04-2021, 08:28 PM
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#8
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Senior Member
City: Sequim Wa
Vessel Name: Michelle
Vessel Model: 1977 Schucker 436
Join Date: Apr 2019
Posts: 268
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Thank you, I will take a look.
Much appreciated!
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02-04-2021, 08:44 PM
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#9
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Guru
City: Between Oregon and Alaska
Vessel Name: Charlie Harper
Vessel Model: Wheeler Shipyard 83'
Join Date: Jun 2016
Posts: 2,730
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If you take the front of the pump apart (easy) you'll find a common micro switch found in many appliances. I will look similar to the picture. Do a search for the number printed on the switch. It will cost $3-5.
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02-05-2021, 12:31 AM
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#10
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Senior Member
City: Sequim Wa
Vessel Name: Michelle
Vessel Model: 1977 Schucker 436
Join Date: Apr 2019
Posts: 268
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Excellent, thanks all.
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02-05-2021, 03:25 AM
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#11
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Guru
City: Seattle
Vessel Name: AZZURRA
Vessel Model: Ocean Alexander 54
Join Date: Aug 2017
Posts: 3,214
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Does the motor have brushes? Stuck brushes or stuck micro switch are the two failures that would respond to a thumping. In my book the pump has put you on notice that it is ready for retirement. I would replace it rather than being inconvenienced.
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02-05-2021, 06:27 AM
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#12
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Guru
Join Date: Oct 2007
Posts: 22,553
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IF you can, install a large 6 to 20 gallon accumulator the pump will not need to operate as often .
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02-05-2021, 08:52 AM
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#13
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Guru
City: Edgewater, MD
Vessel Name: Catalina Jack
Vessel Model: Defever 44
Join Date: Nov 2011
Posts: 3,161
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Yup, if one has the space, a Grundfos, with its own internal tank, is a bullet proof solution to all fresh water problems. It delivers 55 pounds of pressure and at far more volumes than one could ever use aboard a boat. Never suffer pulsating delivery and low pressure again.. Overkill, yes, but so what. The damn thing works and won't ever fail. It is designed to be a booster pump on farms and summer cottages that draw water from lakes.
Quote:
Originally Posted by fgarriso
Buy a 120VAC water pump and run it off your inverter.
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