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Model 580.741700 will not go to high pressure. gas 1400/3hp/2gpm

Model 580.741700 will not go to high pressure. gas engine sounds good and water flows thru hose. put it in basement last summer and was operating correctly, nw this spring I have this problem.

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Posted on Jan 02, 2017

  • 15 Answers

SOURCE: I have a Briggs & Stratton gas power washer. This

Sounds like the unloader is not working correctly. Try replacing it and see what happens.

Posted on Apr 23, 2009

  • 1 Answer

SOURCE: I have a Karcher 2,600 PSI 2.3 GPM Gas Pressure

Hi I have a similar pressure washer from Kartcher and the same scenario as yours I have owned it for about 2 years and noticed that it was getting harder and harder to start with each time I use it which is months. If your pw has a honda engine on it the likely culprit may be the carbuerator. The main and pilot jets may get clogged up with gunk from dired up gasoline. To see if you have a fuel problem spray a shot of starter fluid into the carberator with the choke open, then close it and try to start. If it runs for about a second and dies, then the carbuerator is at fault and you are not getting fuel into your motor and all you're doing is working out your arm.

Posted on Jul 13, 2009

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SOURCE: excell vr2500 pressure washer ,no pressure

check the water filter ---high pressurehose must have bbackpressure to develop pressure so disconecting it wont acheive ,much ,if you have agood water supply ,oil in the pump--- adjust pressure by srewing the brass fitting that the pressure hose attachesto, down that is clock wise a couple of turns or so and see if that makes a difference if not seals in the pumpmay be gone tha t should show by water in the oil

Posted on Jul 30, 2009

  • 3 Answers

SOURCE: Karcher pressure washer with Honda GC160 engine only runs on chok

You need to remove the carb bowl, then with a small flat screwdriver remove the jet. ( on the side, at the bottom of stem.) take a small wire or toothpick and clean the gunk out of the jet, reassemble and open fuel valve, start, and pat yourself on your back.

Posted on Aug 04, 2009

  • 10865 Answers

SOURCE: does not give a continous high pressure flow cuts in and out

Hi. Water flow may be restricted to the pressure washer.

Check that all hoses are free of kinks, leaks, or blockage. Make certain all hoses and fittings are connected properly. Make sure to open the faucet/spigot to full force. Set the spray wand to high pressure.

Clear any debris from the nozzle. If the nozzle has even a little bit of dirt in the tip, it may cause enough obstruction for the pressure washer to pulsate. If your pressure washer came with a nozzle cleaner, use it to clean the tip. If not, you can use a pin or paper clip to clear the nozzle tip of debris that may have become lodged in it.

If these have been checked and the washer is still fluctuating from high to low pressure there may be air trapped in the pump. To bleed the pump of any air, turn the machine off and disconnect the high pressure hose and trigger gun from your power washer. With only the garden hose connected to the machine, turn on your water source and allow water to run through the pump of the machine for 20 or 30 seconds. Turn off the water and connect the high pressure hose and trigger gun and try using the machine again.

Posted on Jul 31, 2010

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2 Answers

Why is there no water flow through on pressure washer?


Sounds like a pump failure. Does yours freeze in winter? Need to winterize like cabin plumbing.
Repair/replacement of pump could be close to new unit.

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Sounds like your pressure pump is shot. Replace it.

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Our rheem pronto tankless rutg-74xp red light will come home indicating hot water and stay on about 2 minutes and then turns off we have turned off and back on and let water run for 5 minutes and will come...


Before calling service technician, open following link for Rheem troubleshooting resources.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

List of causes MIGHT include one of following:
Bad household circuit breaker that powers electronics, or loose wire inside outlet where tankless plugs in.
Tankless fuses and control board.
Water flow rate too low. Minimum .8 gallon required (depending on model)
Tankless inlet filter clogged.
Household aerators clogged at faucets.
Crossover at single-handled faucet
If installed, there can be crossover at mixing valve.
Faulty household check valve, including check valve on re-circulation system if that system is installed.
Restriction in household water line, such as clog at elbow.
Unequal pressure in household hot and cold lines, caused by restriction in hot line. When single-handled faucet turns on, the cold water pressure is higher so hot does not flow and tankless will not turn on.
Loose wire connection inside tankless.
Unit temperature set too high.
Unit temperature set too low.
Water temperature is very hot coming out of tap, so more cold is added, but that reduces amount of hot water flow, so tankless turns off because flow rate is too low.
On some tankless, if water is preheated by solar or other indirect source, the burner will not activate.
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Faulty household pressure tank, if installed -or- pressure tank needs to be installed.

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1 Answer

What would cause a pressure washer to cut off after you pull the handle to get the water started


We used power washers for years

When you pull the trigger, the engine is supposed to accelerate because the back-pressure on the pump is released.

The back-pressure is why you're supposed to keep the gun trigger open when starting the engine. It sounds like you're starting the engine with no water passing through the gun.

Inspect the exhaust port >> if exhaust is clogged with carbon or dirt, then the engine will not run at high speed.

The problem may also be cause by a rusted choke lever. If you notice when a small engine accelerates, the choke lever moves up as the carburetor demands more gas.

Start the engine with water passing through the gun >>> move the choke lever a little bit at a time and see what happens. Keep water going out of the gun. When the surfaces are cool, spray WD-40 on the lever and see if you can free it up. WD-40 is extremely flammable.

If your engine will not fire at all by starting with water passing through the gun, then your gas supply might be limited or your carburetor gummed up. Pull off the rubber gas line that connects to the carburetor and see if gas flows.

Next, pull off the air filter and see if the machine runs good without air filter. You may have clogged air filter.

While the carburetor is exposed, spray WD-40 into carburetor. See if you can get engine up to full throttle while spraying WD-40 into carburetor. Keep spraying the WD-40. Keep the water flowing out of the gun.

If the engine throttles up all the way on WD-40 but won't run without it, then your carburetor is probably gummed up.

Our old power washer won't run with the choke set at full throttle. We just got into the habit of leaving the choke alone. We'd pull off the air filter and spray WD-40 into the carburetor so the engine would spark healthy without messing with the choke at all. And we kept the choke about 2/3 open all the time.

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2 Answers

Burners will not disengage after shutting off Hot Water.


Ok the way this system works is from a pressure and flow switch. The pressure switch picks up the slight drop in pressure when the hot side water is turned on then turns on the burner. The flow switch measures the amount of water flowing and adjusts the size of the burner to the amount of water flow. So a couple different things might be happening. The flow switch might be sticking causing the water heater to throttle down the burner but not off when the water flow is off. Or the gas control valve might be by-passing gas when off causing the burner to stay on even when the demand is off. Run the hot water on high demand then turn the water off. If the burner is still on try banging on the water heater with your hand and see if the burner shuts off completely. If it does the gas control valve might be by-passing. You would also need to check and see if the pressure/flow switch is giving any voltage signal changes when the water flow is off. These tankless water heaters are more comlplicated to work on than a standard water heater and you may need a professional's help...good luck

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1 Answer

Mi-t-m 4003 pressure washer has no pressure


You did not let it freeze did you?
If so, pump is probably bad. Other than that, check for obstruction in intake screen, make sure water is flowing through unit before pulling trigger. On gas models, water must flow before starting engine, otherwise pumps seals will go bad, because water keeps the lubed/cooled.

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1 Answer

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the valve on the throttle body behind the filter may be stuck open.....remove filter and spray throttle body housing with lubricant

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1 Answer

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Sounds like the high speed relay is stuck or not working at all, It is in the main contol box, and can be manually tripped to see if this is indeed the problem. Unless you are a skilled repair tech, this job is better left to a pro.

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