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  #1  
Old 07-30-2021, 02:29 PM
EternalArianne EternalArianne is offline
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Default Pressure washer acting backwards?

I have a Troy-Bilt pressure washer with a B&S engine I was given last year by a family member. The engine runs fine no problem and it’s had strong pressure until today.

For some reason it’s not pressurizing when I press the trigger, yet it will pressurize when the trigger is not pressed. To put it another way, engine ramped up and water is spraying out the release valve, until I squeeze the trigger then it just idles and water just flows out the gun like it’s coming out of a normal hose pipe.

It’s like it’s running “backwards” - it should idle normally then ramp up and pressurize when the trigger is pressed. I never unhook the hose going to the gun, only the inlet hose from my house, so it’s not hooked up backwards. Has the pump gone bad?
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Old 07-30-2021, 05:52 PM
mortten mortten is offline
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Sounds like a blockage somewhere. Leaving water in those pumps isn’t good for them. Likely it’s more cost effective to replace the pump than try to fix it. I took mine apart and there was nothing but white powder inside. I replaced the pump and now run some RV antifreeze through it to protect the pump.
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  #3  
Old 07-30-2021, 06:23 PM
EternalArianne EternalArianne is offline
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What’s weird is that I just used it not even a month ago and it was fine. New pump for this unit is $230, not worth it to me to fix since I only use it a handful of times a year, if that.

I might just try to sell it for the motor, as it runs good and cranks with 1-2 pulls every time. Someone could make use of it for a push mower or something. Thanks for responding.
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Old 07-30-2021, 09:20 PM
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ol'George ol'George is offline
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Don't be so quick to pronounce it dead.
Is the pump belt driven or coupled? check to see it the pump is running then for obstructions of the water both in/out etc etc if you have the manual or service manual read it, if not look it up on the 'net, most newer stuff is available to download free.
See if the hose quick connect came apart
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Old 07-31-2021, 08:27 AM
EternalArianne EternalArianne is offline
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The pump is direct connected to the bottom of the motor. I’ve read online that it could be the check valve is broken, that’s what makes it pressurize when the trigger is pressed. But replacing it requires disassembly of the pump…
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Old 07-31-2021, 01:15 PM
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There's not a lot to those pumps.

I tore mine down in a clean spot.
That way if anything flew out I could find it.

The one I tore apart had a plastic piece that was sticking.

I sanded it and it started working.

I suggest taking it apart .
Especially if you can get parts for it.


...
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Old 11-24-2021, 07:49 PM
EternalArianne EternalArianne is offline
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Just an update. I took the pump apart and cleaned it good. Found the ball was missing from the soap inlet valve (but the spring was still there WTF). Replaced the valve and the temp relief valve (just in case). Replaced the spray wand too. It seems to be working now but then it just shut off while I was spraying and now it won't stay on for more than a few seconds what gives?

It's got fresh gas (I ran it dry last time I used it). My neighbor was over when I was testing, he said it sounds like it's starved for fuel - carb float might be stuck or something. These damn carbs are killing me...
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Old 11-25-2021, 08:40 AM
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If it has an idle screw,
Take it out (Keep up with the position it is set at)
and spray some Carb cleaner in there.

Running preferably, but if it won't start without the idle screw,
It can't hurt to try to clear it out before you remove it.

Hope this helps.
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Old 11-25-2021, 06:16 PM
EternalArianne EternalArianne is offline
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There is definitely some kind of fuel problem as my entire shed smells gas now. Guess it's time to start checking for leaks...
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Old 11-26-2021, 09:00 AM
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Maybe it's the fuel line?
That would be easy.
Hopefully not a hole in the tank or leaky fuel pump.
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