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WanderingStar 03-02-2011 10:17 AM

FW Pump, Rebuild?
I just replaced a Peters and Russell diaphram pump for pressure water with the spare, a Jabsco 36800-1000. I now have two nonworking PAR diaphram pumps. Rebuild kits are about $80. Inexpensive impeller pumps are little more. Rebiuild the old? Are the cheap new ones any good?

night0wl 03-02-2011 11:52 AM

I've had my Shurflo 3 gpm pump go bad after only 3 years (bought the boat new). The pump new can be found for as little as $110...the valve thats gone bad is $40 and no that goes to show you what new stuff is worth nowadays.

I think the rule of thumb is that if you can rebuild for less than 50% of replacement of the EXACT same part (not a inferior substitute), then the rebuild makes sense. Otherwise, replace.

sailingdog 03-02-2011 08:21 PM

Keep the old PAR pumps and re-build them. They'll be a lot better than a lot of the new ones...

MaineFloat 03-02-2011 08:56 PM

Re-build the old. The new stuff isn't all that great.

CalebD 03-02-2011 09:14 PM

If you can get the rebuild kits to work.
I may be a complete moron with 10 thumbs but I went through 2 Jabsco 36800-1000 or similar model diaphragm pumps and 2 rebuild kits for each one without being able to revive either of them. This pump was installed as the bilge pump on our boat when we got it.
After 2 Jabsco units I'm now using a cheaper Rule pump that can be replaced for around $50 when it dies.
The PAR units may be better made and easier to repair then the regular Jabsco line as SD suggests.

WanderingStar 03-03-2011 10:05 AM

All good input, thanks.
I'm grateful to the original owner (now across the bar) for leaving me the replacement pump. Prices run over $300.

svHyLyte 03-03-2011 10:45 AM

Not having purchased a "kit" but only specific parts as necessary, I don't know whether the Kit includes a replacement Pulse Damper but, if not, it should. We also have two of these pumps and I have found that the deterioration of the Pulse Dampers and releated seepage around the seal of the base plate can be an issue. I have also found that replacing the 40PSI pressure switch with the 20PSI switch can make a difference in the endurance of the pump and pressure switches without an appreciable impact on the pump's performance or delivery at the fixtures.


sailingdog 03-03-2011 01:46 PM


Originally Posted by WanderingStar (Post 704571)
All good input, thanks.
I'm grateful to the original owner (now across the bar) for leaving me the replacement pump. Prices run over $300.

In that case, definitely re-build. :D

WanderingStar 03-04-2011 08:21 AM

HyLyte, thanks for that bit of info. The pump was banging before it failed, probably indicating the pulse damper was bad. I'll take them apart some time.

MHRitter 08-05-2013 10:44 PM

Re: FW Pump, Rebuild?
I put Jabsco PAR 36800-1000 (3.3GPM 20-40 psi) together three times, but these last two times I could not get the center screw of the 9 screw bottom plate to get to the threads as if the center screw should be an 1/8 inch longer. I tried the 10-20 psi switch and most of the time it just would not turn on until I tapped it with a screw driver handle and the 20psi was never enough to get the sprayer to engage. Glad I saved both the large and small Pulsation Dampeners cause the new ones failed in short order .

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