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Old 11-29-2010, 06:49 AM   #21
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Vessel Name: Hobo
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RE: pulsating water pump

Woodsong wrote:

Well in all the modern boats I've owned I've never had an accumulator tank whatsoever. I put the new water pump on earlier this weekend and darned if it is not still slightly pulsating....not as much as the previous one I installed, but still pulsing. It's a Jabsco "Par Max 4"- 4.3 GPM. Model 31620-0092.
I guess I need to install an accumulator tank but I sure would like to figure out why it is pulsing when no other modern pump I've had in past boats did this!
*What other modern pumps have you had that didn't pulse without an accumulator tank?

Hobo KK42
Tenacatita, Jalisco, MX

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Old 11-29-2010, 12:25 PM   #22
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pulsating water pump

I honestly don't know the brand of pumps....we had a 2003 Cruisers 3372 express and a 2005 Silverton 38 Sport Bridge that we have owned over the last few years- neither had an accumulator tank or if they did, it was so terribly well hidden that it was never found by me. I particularly knew all the systems on the silverton very well and there was definitely no accumulator tank on that boat...pretty sure the Cruisers 3372 didn't but I guess it "could" have had one hidden somewhere or another.

-- Edited by Woodsong on Monday 29th of November 2010 02:26:05 PM

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Old 12-16-2010, 06:28 PM   #23
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RE: pulsating water pump

One fix would be to install an accumulator in the system.*
You didn't mention brand.* I know the late jabscos have an adjustment that will lower the kick off point on the pump.*
The on time raises the pressure and when it sees x it shuts off is what is happening.* ERGO with all the faucets off it hits x real quick and shuts down.
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Old 12-16-2010, 06:31 PM   #24
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RE: pulsating water pump

Yes you did mention brand.* Pop off that center blue cover and if I recall turn the screw to the left slowly until the pump stops pulsating.* Do recall your original screw position.*
Got to thinking that a partially clogged aerator on a faucet could also cause pump pulsation.

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