Fresh water pump Flow Jet 4125 114 Not Working Questions

hull#1

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

BrentB · Posted: Sat May 04, 2019 1:38 pm Post subject:

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

BrentB · Posted: Sat May 04, 2019 1:39 pm Post subject:

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

thataway · Posted: Sat May 04, 2019 4:09 pm Post subject:

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.

localboy · Posted: Sat May 04, 2019 4:15 pm Post subject:

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.

Hull#01 · Posted: Thu May 09, 2019 10:23 pm Post subject:

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

Hull#01 · Posted: Thu May 09, 2019 10:26 pm Post subject:

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

Gene Morris · Posted: Fri May 10, 2019 11:11 am Post subject:

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

Hull#01 · Posted: Sat May 11, 2019 5:14 pm Post subject:

thataway · Posted: Mon May 13, 2019 9:17 pm Post subject:

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.

kaelc · Posted: Tue May 21, 2019 1:37 pm Post subject:

Any luck Hull?

Our pump seems to have given out or the fuse went this weekend. I couldn't find the 15amp fuse outline in the diagram for our 2007 25 Cruiser. Does anyone know where the fuse is for a similar year?

Planning to test the voltage and pull the pump tonight for more troubleshooting! Fun times.

localboy · Posted: Tue May 21, 2019 2:50 pm Post subject:

On ours I don't know of any fuse to the water pump, except the circuit breaker at the panel where the pump switches on.

thataway · Posted: Tue May 21, 2019 4:54 pm Post subject:

My boat has been re-wired, with larger fuse panel. It does have a fuse in the box, follow the red wire from the switch to the fuse box behind the console. This was the same set up as on my earlier 25 and the 255.

kaelc · Posted: Wed May 22, 2019 12:50 pm Post subject:

Thanks! I stripped the wires just before the pump and there was 14V reading there so I pulled the pump, took it into my local marine shop where they removed the pressure switch and jumped started the pump on a battery. You can see the pressure switch on page three of the exploded view below.

Now I hope to put it all back together right tonight, just 5 more maintenance tasks left to do. Boat ownership!

https://www.pumpagents.com/pdf/JabscoPumps/31705-0092.pdf

thataway · Posted: Wed May 22, 2019 1:11 pm Post subject:

I learned a long time ago that one of the critical items on a boat with a pressure water system, was a spare pump. Usually one of ours would go out in the middle a passage when Marie was in the shower. I used spade connectors on the electrical for quick change out, and quick disconnect (most pumps have these now). We keep an extra pump under the galley--all ready to go--on our 25.

We also carry a "Water puppy" vane pump mounted on a starboard mount, with about 3' of 1/2" hose on each end, with battery clips on the power cord. This can pump fresh water out of the tank if necessary, bail out the dinghy, use to wash down the cockpit or anchor etc.