Question about Karcher PSI Electric Pressure Washer

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I have a K3.68m. I hook up the water turn, on the unit, the hose pressurizes but when I pull the trigger nothing happens. This unit is only about a year old and only used twice. It did the same thing intermittently before. The trigger has a different feel like a switch is not actuating or something when it does this. Please advise. Reg

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  • 68 Answers

Sounds to me like you have a partially blocked jet on the end os the lance. If this is not clear then the machine will not start correctly.

Posted on Jun 10, 2010

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I get hose pressure from my Brute 2600 psi, 6.75hp power washer when the engine is not running, but when I start the engine, I get no additional motor pressure.


The pressure you have when the motor is not running is supply pressure through the unit. When you start the motor it will build up pressure then shut the pump action down until you pull the trigger of the gun. When you release the trigger the pressure drops to zero . This happens through a relief valve that the pressure hose is connected to. If what I stated is not happening then there is a problem with insufficient water supply to the machine or a problem in the relief valve.

Sep 28, 2013 | Yamaha Kawasaki Genuine Kvf750 Brute Force...

1 Answer

I have a honda 2600 pressure washer. After running fine for a couple of seconds the water will stop flowing out the tip. It is receiving water,but will not flow it to the pressure hose. I even disconnected...


This happens when air gets inside the hose. An air bubble of sorts is in the hose and will not build pressure until you blow the air out of the line. Start the pressure washer, turn on the water. pull the trigger on the gun. It will spitter and spatter and come to a trickle. release the trigger on the wand. Pull the trigger again and it will eventually work it self out.

Jun 13, 2011 | Honda Black Max 2600 PSI Pressure Washer

1 Answer

I have used the McCulloch (FH180A) three times over the course of two years. On my fourth use the pressure washer just surged on and off and I would get a tiny spray from the gun each time it surged. In...


Sounds like the problem could be low input water flow or pressure. There could be crud on the intake where you hook up the garden hose, there could be some other sort of blockage. Try hooking it up to the hose and pull the trigger (with the power switched off) and wait to see if water comes out the tip. Also look at the tip(s) themselves. sometimes a piece of crud gets into the hose and then clogs the tip.

May 15, 2011 | McCulloch FH180A Electric Pressure Washer

1 Answer

If a washer not used for a few years would that cause any problems


Hi and welcome to FixYa, I am Kelly
The seals do have a tendancy to harden / dry out or... corrosion prevents the unloader bypass valve from moving / operating properly. I recommend you put a little oil (2 oz maybe...) through the unit on purpose via the inlet water connection. Then connect your water hose and force the oil though the unit with the air in the water supply hose while it purges. DO NOT turn the unit on until your sure the water supply hose has purged out all air. Then turn on the unit making sure that you cycle the wand trigger rapidly for a few minutes by cycling the trigger until the high pressure hose is not so rigid then let the high presure hose charge fully again. Cycle trigger wait, cycle trigger wait. 1 second bursts until you get full pressure. Then use normally. This usually wakes up pressure washers that have been resting :)

Thanks for choosing FixYa,
Kelly

Apr 18, 2011 | Karcher Garden

2 Answers

I bought a honda pressure washer power boss 3000. I load the gasoline, start the machine, but pressure water is not coming out from the trigger. i tried so many things , but can t get started.


If you are using a water tank for water supply, remove the water supply line from the pressure washer and connect a water hose from a faucet. Turn the water on, then crank the engine. Pull the trigger of the spray gun until water comes out. When then water starts to spray properly the release the trigger, shut engine down with pressure on the line then reconnect the water supply from the tank to the pressure washer. If this fixes the problem then the problem was "air-locked"! Happens alot with new pressure washers that have never been run. If you need any other help, please email me @ davidandlisacampbell@yahoo.com

Feb 18, 2011 | Honda Pressure Washer PSI 3000

1 Answer

Engine runs , not getting any water flow when trigger pressed.


Disconnect hoses.
Look for kink in water hose.
Check incoming water connection for filter washer
Replace filter washer
If you don't have a filter washer, put one in.
Hook up water, and turn on
Water should come out other side of pump.
Turn on machine.
Do you get pressured water out of pump.
If no pressure, then pump is suspect
Hook up washer hose without gun
Does pressure come out of washer hose
Finally, the gun trigger may be bad.

We had to buy guns now and then.
Search for pressure washer guns
Following link shows guns we used:
http://www.ultimatewasher.com/pressure-washer-trigger-guns.htm

Oct 25, 2010 | Karcher G2650HHR Gas Pressure Washer

2 Answers

Cant start the unit ,there is to much pressure on the pull chord when water is hooked up.


Trying to start a pressure washer with water supply on and gun trigger off will be a difficult task. It could be comparred to trying to start a lawn mower with the mower in tall grass. Place the mower on the drive or walkway and pulling the rope to start the engine is much easier. It is easy to start your pressure washer with no water in the system however there is a remote possibility that you could overheat the seals if you take too long to turn on the water. It is a little more difficult to start the washer with water supply on and someone holding the trigger to wand open. This will prevents pressure from building and making engine hard to start. You will not damage your washer if you start it with water supply off if you flood the pump and pressure hose with water first . Here is the procedure I use if i am working alone. I trun on the water to pump and open trigger to gun to allow water to flow into pump and pressure hose. Turn off water (leaving the water supply on will make it a little harder to pull starter). Start engine while holding trigger to gun open. When engine starts release gun causing unloader to activate circulating water in pump. Now turn on water and you are ready to work. If your system is under warranty however, I would advise to use the starting procedure outlined by mfg (hold open trigger to gun however). To get the longest life from unit try using it at say 75% of capacity or lower if your can and use max pressure on the tuffest jobs. Leaving your washer at full pressure for all jobs is like driving your car at 100 mph everywhere your go. Good luck.

Aug 24, 2010 | Northstar Professional Series Pressure...

2 Answers

Shuts off when high pressure wand is attached


Hi Brian. Welcome to FixYa I am Kelly. This sounds as if the bypass / unloader valve is stuck in place and the pump id dead heading causing the unit to shut off. (There is most likely some corrosion in the unloader / bypassy valve assy / housing. What you can try is pouring at least 3 oz of oil into the water inlet assy and briefly.... like VERY briefly switch the unit on then back off. Then let it sit over night. The next day connect everything for normal use then turn the unit on again briefly. Use a bucket to PURGE the oil that you put through the system by squeezing the wand Power SW Off until the oil purges. Then switch the unit on and rapidly trip the trigger at 0.5 sec intervals or less. If it trips off wait 5 mins and try it again. Do the rapidly tripping the trigger on the wand routine for about 20 seconds. Your forcing the bypass unloader valve to cycle trying to clear out any debris / corrosion.
This works often and well. There are exceptions. Hopefully it will work for you.

Thanks for using FixYa.

Kelly

May 07, 2010 | McCulloch FHH18A Electric Pressure Washer

1 Answer

I have an electric power washer k3.99M. I just replaced the pressure hose and now the washer will not turn on. If I remove the unit from the water hose, it works, but when I hook everything back up, it...


This sounds like the hose is plugged or the nozzle itself is plugged. If the water cannot get through, the washer senses that the trigger is off and will not turn on the pressure. First just attach the hose without the gun and nozzle. If it pumps water, you know the hose is OK. Then attach the hose and gun ant try it. If it still works then you know it is the nozzle.

Aug 25, 2009 | Karcher Garden

1 Answer

No pressure


It is probably air locked....Here's what you need to do. Connect the garden hose, and HP hose, but not the gun. Turn on the water, and let it run while you make sure that there are no high points in the garden hose that can trap air....Work the hose so that any air is displaced through the pressure washer. Continue in this manner through the HP hose. Shut off the water and connect the gun. Turn the hose back on, and operate the gun for several minutes, pulling the trigger and releasing. This alternately allows the water pressure to build up on house pressure and then to depressure, pulling residual air from the system. Release the trigger, and start the machine. Usually, this is enough to get full washing pressure. If it is very difficult to start, you can hold the trigger down on the gun and pull the start cord at the same time. Holding the trigger down acts as an unloader, making the starting easier.
Hope that this helps, --W/D-- please feel free to rate this solution! Thanx!

Jul 31, 2009 | Garden

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