Question about Karcher K 5.85 M Electric Pressure Washer

2 Answers

Karcher just stopped working

Using the pressure washer when it just stopped without warning, it was if someone had just pulled the plug out. Left it for about 40 mins and tried again but the motor sounded as though it was stuck and not delivering any pressure.

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  • 97 Answers

It sounds like a motor capacitor burned up. Alternatively, a wire could have vibrated loose from the capacitor. Look, but do not touch the capacitor(s), as they can hold a charge that can hurt -- or even kill you.

The trick is to be certain they are discharged before handling. To do this, use a screw drive with a well insulated handle and touch the top of the capacitor where the wires are. The metal blade of the screw driver should touch both sides of the capacitor at the same time. Then, if there is any charge being stored, you will see a pop and that's it -- it is not discharged.

You can buy a new capacitor at any place that sells AC and Refrigeration supplies. Take the old one with you so they can match the microfarad capacity. Just venturing a guess here, but if you want one that fits perfectly back into place you may have to order it from Karcher (because those units are built in Europe I think).

2. The motor may have shorted (gone bad). If that has happened, perhaps you have some warranty. Electric motors are generally warranted a little longer than the PW in general. With Karcher, I don't know. If there is no warranty on the motor, it may be better to buy a new pw than to replace the motor.

3. The problem could be a mechanical issue with the pump/unlooader. However, I would think this would be the least likely scenario.

If what I've given so far doesn't get you rolling in the direction of being resolved, please followup here. I'll be watching. And if it does get you moving in the right direction, please take a sec to rate me. Thanks!
Don

Posted on Mar 24, 2012

Testimonial: "cheers mate. Your second solution was correct. The motor has had it unfortunately. Many thanks for responding and offring sound advice. "

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I have a water cooled K5.140, barrel shaped karcher. Mine suddenly stopped working. Bit of a faff getting the casing apart but not beyond most competent car repairers. Once on the becnh look where the power cables enter the motor unit. Mine has a black box with clip on cover. Look between that and the metal of the motor/pump. There is a thin plastic toggle that will be stiff. WD40 on it and move the flat lever underneath it up and down with a flat screwdriver. This toggle and lever shuts off the power when the water pressure in the pump is high, so if it is stuck open you have no power to the pump. Took me less than 5 mins and a squirt of WD40.

Posted on Aug 23, 2012

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Posted on Jan 02, 2017

  • 389 Answers

SOURCE: I was using the pressure washer and it stopped

This problem, where the unit continually switches on and off when the handgun is closed, is quite common. Unfortunately it has at least six different possible causes, only two of which are easily checked. 
The first thing you can do is look for leaks.  Even the slightest leak will cause this pulsing because the unit gets up to pressure, switches off, loses pressure, switches back on again, comes back up to pressure, switches off... and so on.  This repeated switching is not good for the motor and should not be allowed to continue for longer than necessary to observe what's happening.
So... 1. Does the handgun shut off completely, or does it drip? If it drips, it may simply be because a seal has failed. The handgun can be dismantled, checked, and any defective parts replaced; be sure to lubricate O-rings with silicone grease when reassembling. As a last resort, the whole gun may need to be replaced.
2. Are there any visible leaks at the high-pressure hose screw connections?  If so, most likely an O-ring needs replacing - again lubricate the new one well with silicone grease.
3. If there are no visible leaks, either from the gun or from the connections, all other possible causes are internal within the cylinder head or control head of the pump. New parts will be needed and this normally calls for a professional repair, although it's not beyond the scope of a truly competent amateur.
I hope this helps. Any further questions, just ask! Please remember to rate this response.

Posted on Apr 17, 2009

  • 1 Answer

SOURCE: my karcher pressure washer has lost its water power

I have the same problem. With mine I have to remove the tip that I am using then pull the trigger and then replace the tip and pull and pressure should return. I believe that one of my valves is sticking causing me to reprime the pump frequently. I am trying to clean or replace my valves to fix the problem.

I hope this helps.

Posted on Apr 25, 2009

  • 92 Answers

SOURCE: Electric Karcher pressure washer surging when turned on

Dear firenutt681,
One simple thing you can do, is to check for leaks. Check if hose at machine is leaking. Check gun if it is leaking. You can also check if water still comes out of lance nozzel. These leaks however so small, will cause the machine to surge.
Another reason is due to a faulty SPILL VALVE. This spill valve( often called CONTROL VALVE) will contract when the gun is closed. When it contracts under the enclosed pressure it will switch off the machine by means of a Micro Switch. Now if this Spill valve is faulty it will loose its compression under pressure and puts on the micro switch again. This can be seen once in a while or more frequent, as in your case. I sometimes do service Spill Valves, but mostly I replace them with a new one. I do not know the model number of your machine, but normally you have to open the cover and you should spot the spill valve on the head. Most probably you see a thick wire or a cap containing the micro swith. If you find the micro switch, you have found the spill valve. Sometimes it is a bit hard to pull out the spill valve. Myself, in various Karcher models I remove the spill valve by trying to feed water and put on a bit the machine. In this way the spill valve will be spitted out.
Another reason which makes your machine surge, is leakage from from the detergent inlet.
If you do not see no leakages at all....then for sure it is the SPILL VALVE.
If you cannot do this job yourself or you do not find spare parts...you can continue using the machine as it is...but before closing the gun...switch off the electricity. I only recommend this in an emergency. You do this so that you do not leave the machine surging. This surge will for sure damage the electric motor and the capacitor (assuming it is single phase).
Regards,
Fulltech.

Posted on May 30, 2009

  • 5 Answers

SOURCE: karcher pressure washer trigger problem

The wands that it will not run with would most likley have a little dirt in the tip of the nozzle. This would not allow the water to flow through in turn activating the pressure switch and shutting the machine down

Troy

Posted on Jul 08, 2009

jmgldsmth
  • 2005 Answers

SOURCE: new Karcher pressure washer won't start

replace the fuel carburetor filter and, or, your fuel tank filter

Posted on Aug 31, 2009

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I have DeWalt3750 psi pressure washer, its been long time since I used it, now that I wanted to use it, I can not start it. I already changed the oil and filled it up with new oil but still can not start,...


Here is the long answer with everything we learned while using a power washer twice a day for years::
This assumes you did not turn power washer over or on its side to drain oil, or dirty oil will flow into carburetor requiring complete carburetor cleaning.

It sounds like could be one of the problems listed below or a combination of those things.
1) The exhaust is partially blocked. Check the screen covering exhaust port for carbon and dirt build-up. High-speed exhaust air must pass freely. We finally broke the exhaust screen out with a screwdriver to get our machine going one day.
2) Gas is not flowing freely to carburetor > under gas tank, find the rubber hose connected to carburetor. Pull off rubber hose and make sure gas flows freely. You can use this hose to drain gas tank of old gas ... and then put in fresh gas.
3) Carburetor is partially gummed up and engine cuts off when gas flow slows down. Buy some gum out, and then don't store power washer with gasoline in the tank. Or put additive in gas when storing machine.
4) The choke is letting in too much gas or not enough gas. Try different adjustments. The choke-lever on our power washer got so bad that we could not set throttle at full open or the machine would die. We still use the machine at 2/3 throttle, and then start it each time using WD-40 as described below.
5) Dirty air filter that won't let engine breath enough air to keep up with combustion. Take off air filter and see if problem persists.
6) The spark coil is going bad?? Change spark plug to see if problem persists. Is spark plug wire pushed all the way onto the spark plug?

Now the nitty gritty: we're gonna start that thing right now
7) Take off air filter. Spray WD-40 directly into carburetor. Yes, we use WD-40 every time to start my power washer, and we use the washer twice a week.
Spray in the WD-40, Pull the engine cord. The engine will fire on WD-40. Guaranteed.
Once it starts, keep spraying WD-40 directly into carburetor to keep engine going.
If engine will not fire and keep going on WD-40, then your spark is suspect.
If your engine fires and runs on WD-40 but dies without it, then your gas supply or carburetor are suspect
8) Carburetor problem >>> try Gum out >>> and then take machine to small engine repair shop
9) Spark ... take out spark plug. Put spark wire back on. Hold spark plug by spark wire. Touch metal threads of spark plug to metal opening where plug came out. Metal to metal. Pull back start cord and look for spark between the metal.
If you have no spark, then spark coil is bad >>> take machine to small engine repair shop

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Here is the long answer with everything we learned while using a power washer twice a day for years::

It sounds like could be one of the problems listed below or a combination of those things.
1) The exhaust is partially blocked. Check the screen covering exhaust port for carbon and dirt build-up. High-speed exhaust air must pass freely. We finally broke the exhaust screen out with a screwdriver to get our machine going one day.
2) Gas is not flowing freely to carburetor > under gas tank, find the rubber hose connected to carburetor. Pull off rubber hose and make sure gas flows freely. You can use this hose to drain gas tank of old gas ... and then put in fresh gas.
3) Carburetor is partially gummed up and engine cuts off when gas flow slows down. Buy some gum out, and then don't store power washer with gasoline in the tank. Or put additive in gas when storing machine.
4) The choke is letting in too much gas or not enough gas. Try different adjustments. The choke-lever on our power washer got so bad that we could not set throttle at full open or the machine would die. We still use the machine at 2/3 throttle, and then start it each time using WD-40 as described below.
5) Dirty air filter that won't let engine breath enough air to keep up with combustion. Take off air filter and see if problem persists.
6) The spark coil is going bad?? Change spark plug to see if problem persists. Is spark plug wire pushed all the way onto the spark plug?

Now the nitty gritty: we're gonna start that thing right now
7) Take off air filter. Spray WD-40 directly into carburetor. Yes, we use WD-40 every time to start my power washer, and we use the washer twice a week.
Spray in the WD-40, Pull the engine cord. The engine will fire on WD-40. Guaranteed.
Once it starts, keep spraying WD-40 directly into carburetor to keep engine going.
If engine will not fire and keep going on WD-40, then your spark is suspect.
If your engine fires and runs on WD-40 but dies without it, then your gas supply or carburetor are suspect
8) Carburetor problem >>> try Gum out >>> and then take machine to small engine repair shop
9) Spark ... take out spark plug. Put spark wire back on. Hold spark plug by spark wire. Touch metal threads of spark plug to metal opening where plug came out. Metal to metal. Pull back start cord and look for spark between the metal.
If you have no spark, then spark coil is bad >>> take machine to small engine repair shop

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It sounds like could be one of the problems listed below or a combination of those things.

1) The exhaust is partially blocked. Check the screen covering exhaust port for carbon and dirt build-up. High-speed exhaust air must pass freely. We finally broke the exhaust screen out with a screwdriver to get our machine going one day.

2) Gas is not flowing freely to carburetor > under gas tank, find the rubber hose connected to carburetor. Pull off rubber hose and make sure gas flows freely. You can use this hose to drain gas tank of old gas ... and then put in fresh gas.

3) Carburetor is partially gummed up and engine cuts off when gas flow slows down. Buy some gum out, and then don't store power washer with gasoline in the tank. Or put additive in gas when storing machine.

4) The choke is letting in too much gas or not enough gas. Try different adjustments. The choke-lever on our power washer got so bad that we could not set throttle at full open or the machine would die. We still use the machine at 2/3 throttle, and then start it each time using WD-40 as described below.

5) Dirty air filter that won't let engine breath enough air to keep up with combustion. Take off air filter and see if problem persists.

6) The spark coil is going bad?? Change spark plug to see if problem persists. Is spark plug wire pushed all the way onto the spark plug?

Now the nitty gritty of starting that bad boy and making you happy again!!!!

7) Take off air filter. Spray WD-40 directly into carburetor. Yes, we use WD-40 every time to start my power washer, and we use the washer twice a week. Spray in the WD-40, Pull the engine cord. The engine will fire on WD-40. Guaranteed.

Once it starts, keep spraying WD-40 directly into carburetor to keep engine going.

If engine will not fire and keep going on WD-40, then your spark is suspect.
If your engine fires and runs on WD-40 but dies without it, then your gas supply or carburetor are suspect

8) Carburetor problem >>> try Gum out >>> and then take machine to small engine repair shop

9) Spark ... take out spark plug. Put spark wire back on. Hold spark plug by spark wire. Touch metal threads of spark plug to metal opening where plug came out. Metal to metal. Pull back start cord and look for spark between the metal. If you have no spark, then spark coil is bad >>> take machine to small engine repair shop

Let us know how it comes out!!

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Pressure washer takes oil in two places:
Pump oil is 20-30 weight SAE non detergent and comes half way up/ do not fill more than 1/2 way
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IF you overfilled the oil >>> DO NOT turn power washer on it's side or upside down to drain oil >>> because engine oil will fill carburetor

When engine won't start
We pull off air filter so we have direct access to carburetor
Spray WD-40 into carburetor while starting
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You can keep spraying WD-40 into carburetor to keep engine running while moving choke to see if engine will run on it's own
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If engine will not fire on WD-40
Spark is suspect
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If coil is bad you get no spark > and coil needs needs replacement
Take out spark plug, clean it with WD-40 and use a bit of sandpaper in the spark gap
Put spark wire back on plug
Touch threads of spark plug to metal part of engine > pull cord and look for sparking between spark plug and engine
If you do NOT have any sparking, then coil is bad
If you HAVE spark, then your spark plug needs cleaning or replacement

If engine fires on WD-40 but will not keep running
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Quick wash cycle for the Hotpoint FEW12 is 'K'

A 95* White cotton, heavy soil ........ 5.5kg 2hours 30/40 mins Fast spin
B 40* White cotton Heavy soil .......5.5kg 1hour 40/50 mins Fast spin
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E 40* Non-colour fast cotton, linen or viscose.....5.5kg 1hour 40/55 mins Fast spin
F 50* Synthetics, coloured nylon, polyester, acrylic & cotton mixtures, cotton or viscose with special finishes, coloured polyester & cotton mixtures.....3kg 1 hour 5/15 mins Slow Spin
G 40* Acrylics and tri-acetate blends of these fabrics with wool, polyester & wool blends....3kg 40/50 mins Slow Spin
H 40* Wool, shrink resistant machine washable wool, woolen blankets..... 1.5 kg 1 hour 15/25 mins Fast Spin
H...(Wool mixtures with cotton or rayon.....2.5 kg)
J 30* Silk, printed acetate.....3kg 55 mins/1 hour 5mins... Slow Spin
K Quick wash for freshening up lightly soiled items. Warning... not for woolen, silk or delicate items.....1kg 35/45 mins Slow Spin
L Cold wash, cold fill only, no heating action....3kg 55mins/1hour 5 mins Slow Spin
M Rinse and Fast Spin... cotton......5.5kg 55 mins/1hour 5mins...Fast Spin
N Rinse and Slow Spin... Delicates....3kg 30mins Slow Spin
P Fast Spin .... cotton.... 5.5kg 15 mins Fast Spin
Q Slow Spin.... delicates.....3kg 15 mins Slow Spin

Hope this helps

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You have a poor signal to the spark plug usually caused by a rusty fly wheel found underneath the pullcord casing. clean it with releasing ajent such as wd 40. common when not in use for a while.

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