2500 PSI Pressure Washer

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I don’t know what a car boot sale is but sounds as if relief valve is stuck open.if this car boot thing is a car lot they use all kinds of stuff to clean cars in the water they use to wash a car. this washer has probably been let set up without being flushed after use. the problem isn’t in the pump most likely but a corroded relief vale. remove and clean.

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The reason for this is because a build up of water pressure. On the water inlet or coupling the water can cause a pressure build up, popping the garden hose off. The aqua stop is a valve in the end of the garden hose connection that restricts water flow.
You may need to rebuild or replace the pump assembly. If the pump is more than a few years old, and you use the pressure washer fairly often, replace the pump assembly. If the pump is relatively new, and you don`t use the pressure washer often, either rebuild the pump assembly or replace the pump seals.
PLEASE NOTE: You should always press the RESET button on the GFCI before using the pressure washer.
If the machine is pulsing whilst in use, it may be that the accessory you are using has a blockage. Clear by soaking the accessory in warm soapy water and then rinsing out under the tap.
The main reason which may cause the pressure washer to leak from the inside is if the cylinder head – either cracked or failed. This is often caused by the pressure washer being stored in an area that can freeze during winter.
One of the most common reasons a pressure washer won`t stay running is because the spark plug is dirty or damaged. To clean the spark plug, you will need to remove it from the engine and use a wire brush to remove any build-up on the electrode.
The number one cause of low or no pressure when using a pressure washer is a blocked or worn nozzle. Blocked nozzles will prevent water from escaping, while a worn nozzle will allow too much water to pass through, causing the pressure to drop.
Pressure may decrease if your packing is worn out or if there are abrasives or severe cavitation (bubbles) in the pumped fluids. This can be caused by an inadequate amount of water and/or a lack of proper filtration. To fix, install the proper filter.

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Karcher 601c Hi I bought a Karcher 601c from car boot sale. The machine works, but no water is coming out. What could be the problem?
ANSWER : I don’t know what a car boot sale is but sounds as if relief valve is stuck open.if this car boot thing is a car lot they use all kinds of stuff to clean cars in the water they use to wash a car. this washer has probably been let set up without being flushed after use. the problem isn’t in the pump most likely but a corroded relief vale. remove and clean.

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My Karcher 720mx moter is working fine but i have no water pressure coming from pump
ANSWER : Hi put some silicon spray in inlet and outlet then reconnect hoses what is going on is when you store it the seals start to dry out………

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Couple of guys tried to help me on this, perhaps you guys could come back. I forgot to mention there is a pressure tank bladder type on the discharge side. Could the air in this tank be messing with the prime. I checked the intake. It has water in it after bleeding air from the discharge system where before it was dry before purging air. I think there is air in the system and wonder if it is coming from the pressure tank?. i open up one of the discharge valves and a lot of air comes out. Should I put a valve on the pressure tank to take it off line until I get water from the well?

Mar 12, 2010 – Could it be the check valve? I took it off and the flap appears to be working correctly. This well has been here a long time. Never given me any problems. I do have galvenized couplers on the discharge and intake sides. Old. Could these be leaking even though they show no sign of water? The discharge is able to hold 30 pounds easily overnight. I do not hear any vacuum in the intake when I take it off. Could the pipe to the well have a leak? I know I would have to insert a sleeve but I do not want to go through the hassle if I do not have to. I had put on a brand new pump from the hardware store that did the same thing so I think that would elliminate the pump as being the problem.
I disconnected it for the winter and rehooked it up. The galvanized couplers on the discharge and pump side are old but do not appear to be leakeing as I taped them well. The check valve seems to be functioning well as I took it off and the flap works correctly. The well is not pulling water. there does not appear to be a vacuum on the check vale when I losen it. could the check valve be bad? I am aware I might have to resleeve the well, but do not want to hassle with this if I do not have to. I want to eliminate everything else first. i put another brand new pump on it to see if it was that. That partiuclar pump which was the same thng did not work either.
I took the pump nose off and looked at it. The one way valve appears to be working fine. The impeller is working fine also evidenced by when I turn it on witht the discharge cap off, water shoots out. When I open one of the discharge valves and turn it on, the pressure drops to 10lbs. At this point the prime water has moved through the pipe and and the pump does not soound like it has any water in it. I pull the cap off and have to “reprime it again.” It again goes back to the pressure gauage rapidly fluctuating while pump on. I disconnect pump on intake side I hear no vacuum. The guage is on the discharge side. The seals on the pump nose do not look frayed or damaged. The pump is not leaking water in any of the joints. The pipes on discharge and well side do not appear to be leaking.

ANSWER : My friend, please boil your question down. Your title has to do with riding mowers but the leaking, bladder, impeller, air bubbles, pressure tank, check valve comments seem to be migrating toward a pump of some kind – well? spa? pool? irrigation?

Briefly, any system that involves a water source, a water moving device, water storage device and ultimate useage is subject to leaks … into the system and out of the system. If this is a well and you have air in your system, your pump may be sucking air at the well or any loose connection between the tip of the pipe and the inlet to the pump. Your bladder could have failed but from what I can get from your comments, this is not the case. On the pressure side, neither air nor water will leak in … only out.

Please recheck all connections. Make sure your check valve is installed correctly and not leaking. The check valve assists the foot valve, which may have failed.

I am more inclined to think your well may be at the end of its useful life. To prove or disprove, you could have a plumber put a vacuum gage on your pump. He or she can answer this question is about 90 seconds based on this test. Expect to pay for one hour of time, which will be less than the time you have already invested in your project.

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I have a karcher 2.o1 pressure washer does not work when i turn the water on, if i turn the water off it works, cant figure it help , help please
ANSWER : Please try without the high pressure lance on. If this works then you may have a blocked jet in the lance.

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No pressure Pump reassembly. I purchased a new pump and installed it. Got machine back together and I’m not getting any pressure. What would be the signs if I don’t have the shaft key in properly? Or any other suggestions?
Water comes out of nozzle with pressure for a quick second then no pressure, just water. This is a brand new pump so was curious if I installed it wrong. Wondering before taking it apart again.
ANSWER : No pressure would be a sign that the key was not in properly.

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I have had 3 Karcher pressure washers all experience the same problem and so have two of my neighbors. Our area has very hard water and it causes problems with the washer not bringing up the pressure when the trigger is pulled (or surges up and down) and the nozzles clogging, etc. The service repair facilities cannot tell me how to prevent this. Many attempts to contact Karcher for advice have been ignored. I have been thinking that perhaps running the engine for a few seconds with no hoses attached and shooting WD-40 as a water displacer into the hose inlet might work. Do you have any recommendations or suggestions? My most recent purchase of a Honda pressure washer lasted only two uses and the pump froze up.
ANSWER : If your water is that hard (and it appears it is) WD40 will NOT solve the problem. You should look into a water softener. However, chances are that a small, inexpensive model will not have the flow capacity required for a pressure washer. You’ll likely need to look at a larger, whole-house model.

Use vinegar to through the machine’s “soap” dispenser to break up the hard water deposits or a heavier solvent such as CLR which is available at most retail outlets.

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The karcher works well, but when you stop spraying. The pump cycles on and off.
ANSWER : This is a cooling feature. There is a thermal coupler to allow the cool water to cycle and cool off the pump.thank you Joe

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Water is leaking from the bottom of washer mower is running and some water is coming out
ANSWER : Ive seen this before, lots of people dont clean out there power washers when not in use, hard water build up is a big problem in these units witch cause the pump not to surge correctly, you should get it serviced, thankx

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