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  #21  
Old 09-08-2021, 11:31 AM
bcd bcd is offline
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It's not a completely worthless test. If he's got a partial short in the harness or motor, it would find that. Yes, it might not show anything, but it could find something.

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  #22  
Old 09-11-2021, 05:41 PM
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86Skier 86Skier is offline
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Had the boat on the water today and messed with the diagnostic screen while trying to run the pump. It showed nothing when I started, but every time I'm on that screen, if I manually trigger the pump, it turns on, but squeals, screen shows a green dot... then pump shuts off and screen shows the little orange exclamation point in a triangle symbol and adds 1 to the count each time. The dot never changes color, just green when I hit the pump, and nothing when it shuts off. Same for fill and empty. I'm just planning to throw a new pump at it unless someone knows better.

(Did not have time to make a jumper wire this week, so didn't try that, but did toss a new impeller in before we left the driveway today just for $hits and giggles.)

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  #23  
Old 09-12-2021, 07:30 PM
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tr6coug tr6coug is offline
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If it squeals when it turns on then maybe you have a pump motor problem like a bad bearing. If you take the impeller off can you turn the pump shaft manually? If its rough or very stiff it could be causing a high current draw and the computer is turning it off for a legit reason.

When I first got my boat one of the pump heads was leaking and water got into the motor and corroded the bearings. The pump motors are not water proof.
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  #24  
Old 09-12-2021, 11:03 PM
jpwhit jpwhit is offline
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I really expected you to see an over-current error. Open circuit (under-current) is a little unexpected. But I just checked and the Jabsco pumps do have an internal auto resetting thermal fuse inside the motor. So I suspect the motor is overheating, the thermal fuse is opening up, then the PDM tells the computer to shut down the ballast pump due to an under-current error. As @tr6coug suggested, the motor bearings are probably corroded and that's causing the pump to overheat. I think replacing the pump will likely fix the problem. Especially if the pump is making strange noises.
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  #25  
Old 09-13-2021, 07:42 AM
bcd bcd is offline
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If you're feeling adventurous, pull the pump out and remove the motor. Spin it by hand and see how it feels. Then take it apart and see what it looks like inside. Here's how to:

https://teamtalk.mastercraft.com/showthread.php?t=42810
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  #26  
Old 09-13-2021, 02:41 PM
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86Skier 86Skier is offline
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Anybody have input on the best place to source a Jabsco “Puppy” Model #18670-6127? Tried MCPartsDepot but couldn’t find one… and wakemakers has bunch of similar looking models (18220-1127), but not the exact number…. Is that a direct replacement?

I have a call into my dealer just to see if they have any in stock (since I might be able to get it faster), but looking for other opinions or sources.


(also, just to complain… but who the hell uses flat head screws anymore? I mean seriously, it’s already in a hard enough spot to reach, but couldn’t they have used hex head or torque heads… or at the very least, phillips, on the impeller cover bolts? Just a quick rant to get it off my chest…)
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  #27  
Old 09-13-2021, 03:37 PM
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blackhawk blackhawk is offline
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https://www.wakemakers.com/jabsco-ba...-oem-pump.html

Description says this is a direct replacement for 18670-6127.
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  #28  
Old 09-13-2021, 04:01 PM
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86Skier 86Skier is offline
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Quote:
Originally Posted by blackhawk View Post
https://www.wakemakers.com/jabsco-ba...-oem-pump.html

Description says this is a direct replacement for 18670-6127.

Thanks! Order placed and fingers crossed.
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  #29  
Old 09-14-2021, 06:38 PM
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tr6coug tr6coug is offline
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Quote:
Originally Posted by 86Skier View Post
who the hell uses flat head screws anymore? I mean seriously, it’s already in a hard enough spot to reach, but couldn’t they have used hex head or torque heads… or at the very least, phillips, on the impeller cover bolts?
Completely agree. Hex head would be a much easier. Maybe they still use flat head screws so people don't torque them as much since they are brass heads & screws.
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  #30  
Old 09-18-2021, 05:13 PM
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86Skier 86Skier is offline
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New pump was the key. Working great today.

Swapping out was easy... right up until I had to unplug the old one... at the bottom of the engine bay, crammed between the engine and hull at full arms lengths in the blind as my body and head were wedged in entirely odd positions. Terrible spot to place that in the wiring harness. But I got 'er.

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