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Fresh water pump Flow Jet 4125 114 Not Working Questions

 
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hull#1



Joined: 22 Nov 2014
Posts: 11
City/Region: Steilacoom
State or Province: WA
C-Dory Year: 2006
C-Dory Model: 23 Venture
Vessel Name: No Worries
Photos: Hull #1 Venture 23
PostPosted: Sat May 04, 2019 11:30 am    Post subject: Fresh water pump Flow Jet 4125 114 Not Working Questions Reply with quote

Good Morning

I have a 2006 cape cruiser 23 Venture and the fresh water electric pump is not working. I pulled voltage at the wires at the pump connection so I have voltage. So I removed the pump and jumped the pump off the battery to see if I could here any clicking noise or any noise in general and couldn’t hear anything. Is the pump shot at this point or is there any other troubleshooting methods? Thanks

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BrentB



Joined: 15 Jul 2006
Posts: 4261
City/Region: Greenwood
State or Province: IN
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PostPosted: Sat May 04, 2019 12:38 pm    Post subject: Reply with quote

maybe

Is check valve clear?

I dont have a pump drawing to check

I would further disassembly

maybe in pump
ruptured Switch Diaphragm
check valve

or
Bad Microswitch
Loose Wire at Switch

I would take apart until I can test the motor only with DVM and try to spin drive shaft

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BrentB



Joined: 15 Jul 2006
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PostPosted: Sat May 04, 2019 12:39 pm    Post subject: Reply with quote

https://www.pentair.com/content/dam/extranet/brochures-and-catalogs/product-manuals/shurflo/SF_PumpTroubleShoot.pdf
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thataway



Joined: 02 Nov 2003
Posts: 16663
City/Region: Pensacola
State or Province: FL
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: thataway
Photos: Thataway
PostPosted: Sat May 04, 2019 3:09 pm    Post subject: Reply with quote

The pumps have a pressure switch--that could be bad--jump around that directly to the motor. What brand is the pump--many have rebuild kits. Usually it is valves which give out, or diaphragms that fail, rather than motor.

If it is the pressure switch, replace that.

How much voltage at the pump--just saying "voltage" does not help a lot--it should be the same as the battery--12.7 volts.

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Thataway
Thataway (Ex Seaweed) 2007 25 C Dory May 2018
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localboy



Joined: 30 Sep 2006
Posts: 4108
City/Region: Lake Stevens via Honolulu
State or Province: WA
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: 'Au Kai (Ocean Traveler)
Photos: 'AU KAI
PostPosted: Sat May 04, 2019 3:15 pm    Post subject: Reply with quote

I've had some just trashed. Rusty with the motor fried. On our model it was mounted in the wet bilge. I've since raised it to get it up higher and they now last. Also freezing w/ water in the pump is the death blow. I've also rebuilt one w/ a new pressure switch, diaphragm etc. Take it apart and look. They are really simple. I now use Johnson ones, too. The Jabsco ones kept dying... Is it the brand or the getting it up, dry that made a difference? Who knows.
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Hull#01



Joined: 09 May 2019
Posts: 5
City/Region: Steilacoom,
State or Province: WA
PostPosted: Thu May 09, 2019 9:23 pm    Post subject: Reply with quote

Sorry for the late night. Somehow I got locked out of my account and had it set up a new user ID. I disconnect the pump and have a voltage before the pump and jump the pump I don't hear anything. I thought I would hear a click or something maybe? I also see that troubleshooting PDF summary check that out right now as well.

It is the pump for the freshwater system, an adventure 23, and it is a flow jet model 4125-114 and they also notes similar to a Jabsco 31705-0092

It is unclear when you say jump at the motor you mean the wires coming out of the motor not taking it apart and jumping it internally?

Thanks much

Doug

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Hull#01



Joined: 09 May 2019
Posts: 5
City/Region: Steilacoom,
State or Province: WA
PostPosted: Thu May 09, 2019 9:26 pm    Post subject: Reply with quote

Sorry for the late reply. Somehow I got locked out of my account and had it set up a new user ID. I disconnect the pump and have a voltage before the pump and jump the pump I don't hear anything. I thought I would hear a click or something maybe?

It is the pump for the freshwater system, an adventure 23, and it is a flow jet model 4125-114 and they also note similar to a Jabsco 31705-0092

It is unclear when you say jump at the motor you mean the wires coming out of the motor not taking it apart and jumping it internally? I just tried again and I cant hear a single noise. Found a couple of U tube videos but they were not very helpful. Could bad pressure switches put it into a nonactivatable state? I am not familiar with the internal workings of these pumps. thanks much Doug

Thanks much

Doug
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Gene Morris



Joined: 28 Sep 2006
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PostPosted: Fri May 10, 2019 10:11 am    Post subject: Reply with quote

Hull;


The pressure switch will not allow the motor to activate unless there is a pressure required to put water through the system. Otherwise the pump would have to be turned on each time you need water. There is a switch under the end cap where the wiring comes out of the assembly. Remove the end cap and you should see that there is a switch. Bypass the switch and try to jump directly from the wires leading from the motor. I have had to replace the pump a couple of times and it was the motor that was faulty.

Gene

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Hull#01



Joined: 09 May 2019
Posts: 5
City/Region: Steilacoom,
State or Province: WA
PostPosted: Sat May 11, 2019 4:14 pm    Post subject: Reply with quote

Gene Morris wrote:
Hull;


The pressure switch will not allow the motor to activate unless there is a pressure required to put water through the system. Otherwise the pump would have to be turned on each time you need water. There is a switch under the end cap where the wiring comes out of the assembly. Remove the end cap and you should see that there is a switch. Bypass the switch and try to jump directly from the wires leading from the motor. I have had to replace the pump a couple of times and it was the motor that was faulty.

Gene


Thanks I will give this a try when I get home. I wonder if I was having a presssure problem with the whole system in the first place or maybe I am misunderstanding how the pump works. Is there a pressure test process for press water system? Thanks much
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thataway



Joined: 02 Nov 2003
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City/Region: Pensacola
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C-Dory Model: 25 Cruiser
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PostPosted: Mon May 13, 2019 8:17 pm    Post subject: Reply with quote

There is a switch on the end of the pump. If there is no water pressure, the switch is closed, and current flows thru, causing the pump to operate. When the pressure gets to XX (usually 20 to 30 PSI) the switch opens, and the pump turns off. There is going to be a low point in pressure where the switch closes again--often 15 PSI--so it may cycle as the water is flowing.

It is being suggested that the switch be taken out of the loop. That is applying current to the motor--disconnected from the switch--the wire going out of the switch.
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