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washdown pump tripping

Old 05-13-2008, 05:10 PM
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Default washdown pump tripping

After approx 45 seconds or so my washdown pump trips at the dash circuit breaker. Sometimes you can switch it back on and your good for another 45sec. or so. Sometimes it trips immediately and after letting it cool down I'm back in action for a shot while.
I have change the breaker to the dash switch, replaced the washdown pump also and checked all the connections . Everything seems to look fine.
Any suggestions welcomed
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Old 05-13-2008, 05:55 PM
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Default Re: washdown pump tripping

Have you checked the wire size? Undersized wire for the amp. draw of the pump could cause the pump to heat up. You might want to run a couple of heavier wires direct to the battery with a fuse in line and see if it will hold. If it does you can start checking for a pinched wire or bad ground. Just a thought.
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Old 05-13-2008, 06:02 PM
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Default Re: washdown pump tripping

Wash down pumps generally run up to a set pressure and cut off. The pressure switch is usually part of the pump.

When you cut it on and it is not supplying flow then it should run just a few seconds to pressurize the system and then shut off automatically. Then when you open a hose sprayer the pump will again kick on.

This is how mine works anyway.

If the pressure switch is bad the pump may run all the time against a very high pressure which can cause the motor to draw too much current and trip the breaker or blow a fuse.

Just some more info that might help.
Old 05-13-2008, 06:39 PM
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Default Re: washdown pump tripping

I had the same problem. I thought it was the fuse size, but it turned out to be the pump overheating. I rewired with heavier wire. No problems with that now.
Old 05-16-2008, 04:54 AM
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Default Re: washdown pump tripping

Thanks for the suggestions , I`m willing to bet one of them will fix the problem.
Thanks again
Old 05-06-2019, 10:01 AM
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I came across this old thread looking for solutions, but wanted to share for those that stumble across is while searching threads. I'm in the same situation, tripping breaker after 30 seconds sometimes less. I upgraded to a higher flow pump from what came on my boat, it basically doubled the flow rate so I should have already known throwing a breaker was going to be a problem.

Believe it or not I actually referred back to the manual just looking for a wiring diagram and noticed a table that listed 24volts as an option for running running the pump. BINGO!

For those not wanting to run a heavier gauge wire to the console switch, I plan to wire up the pump in series on both batteries. In theory, this will cut the amp draw in half, minus the new length of wire that will add resistance into the circuit. Either way, it should solve the problem without running wires all the way up to the console.
Old 05-06-2019, 01:41 PM
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Originally Posted by stobra34 View Post
I came across this old thread looking for solutions, but wanted to share for those that stumble across is while searching threads. I'm in the same situation, tripping breaker after 30 seconds sometimes less. I upgraded to a higher flow pump from what came on my boat, it basically doubled the flow rate so I should have already known throwing a breaker was going to be a problem.

Believe it or not I actually referred back to the manual just looking for a wiring diagram and noticed a table that listed 24volts as an option for running running the pump. BINGO!

For those not wanting to run a heavier gauge wire to the console switch, I plan to wire up the pump in series on both batteries. In theory, this will cut the amp draw in half, minus the new length of wire that will add resistance into the circuit. Either way, it should solve the problem without running wires all the way up to the console.
What pump are you using that you will switch to 24 vdc from 12? Most washdown pumps are either 12 or 24 in different model designations that look the same, and have the same instructions including both models. Just take care not to run 12 v pump on 24v.

As a "for instance", the specs for the Shurflo Blaster II in this ad say 12/24 v, but you have to scroll down below that to see the 2 different "Available Models" to see 12 vs 24vdc:
https://www.defender.com/product.jsp?id=2661506
Just want you to be sure.
Old 05-09-2019, 02:15 PM
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Taxi, you are correct on this. My pump runs only a 12v....THANK YOU. My next idea is to branch a new circuit; battery ---> circuit breaker ---> 12v solenoid ---> pump. I would use the existing circuit that goes to the helm for the low amperage side. Has anyone ever tried anything like this? Here's the circuit;





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