Question about Karcher 2500 PSI Pressure Washer

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2400 psi pressure washer... what oil is used in the piston/bearing housing?

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Hello cgreers:
I am assuming you are speaking of the pump pistons, not the motor.
10W30 oil is OK but you must be sure it is NON DETERGENT. Also be sure the reservoir is only 1/3 to 1/2 full.

Posted on Jun 28, 2009

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I have a Winner 108 pressure washer. I think it's owned by Karcher. I was dismantling it to get the faulty run capacitor out, and when i pulled the housing off, it leaked out about 50ml of oil. What oil,...


The oil is there to lubricate the pistons as they are pushed by the swash plate. This oil is usually normal multi- grade engine oil. In bigger machines, grade 90 oil is used. If you are not sure, get some multi-grade and 90 oil, and test with your hand. It should be very easy to see the difference. When filling, see that at least the pistons with the springs are getting wet with oil. Important not to overflow the oil. This overflow, might cause pressure and oil will get out of the seals and mix with the water. On the other hand, the seals must be renewed once you opened the oil side. This because water can enter through the seals and mix with the oil.
Regards,
MG.

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Started by Craftsman 2700 PSI , 2.3 GPM Briggs & Stratton Powered Pressure Washer for first time in 9 months. Added new oil, and gas. started but is smoking from muffler and is dripping what appears to...


The first thing I would check would be the oil level, to make sure you didn't put in too much oil. If the oil level is correct, it could be a stuck piston ring, letting oil blow by the piston, and out the exhaust. If this is the case, you are going to have to tear down the engine.

Hope this helps!

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1 Answer

Gas mixing with oil even while motor is running. whats causing this?


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hi spray some silicon oil in inlet and outlet then run attach hose back do this everytime you store the washer away it is because the seals dry up always lube when storing.

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I do like to know if this washer is good enough for my business as a used car dealer? Briggs & Stratton Murray 020456 2400 PSI 20 GPM 190cc Briggs Stratton


We power washed houses for years with a 2400psi machine. The machine weighed about 90 pounds. 1 strong man could pick up the weight, but usually it took 2 men to unload it from the trailer.

A small machine can advertise 2400 psi ... but that is for 3 square inches at a time. The heavier machine shoots a 10" or wider swath of 2400psi.

We ran our machine twice a week for years. We had a honda engine. I'm sure the briggs engine is good. I wouldn't buy a used machine... unless the price was low and it started on first pull. Electric starter on your power washer might be a repair-waiting-to-happen because it is constantly exposed to water and dirt.

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2 Answers

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if the water is flowing
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if no water pistons in pump need to change.

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1 Answer

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Did you try a new spark plug. Old one may have fouled.

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1 Answer

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Most likely your air filter is plugged or dirty, or the crank case vent valve needs to be cleaned.if it still does it check that the oil level is at the full mark, if overfilled it would cause the same problem.

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1 Answer

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your pressure relief valve is stuck open. i know that may sound too simple but it depends on if you use a cleaner with the water when your using it , not flushing with clean water after use can cause the housing of the aluminum housing of the relief valve to corrode. the valve can't move back and forth as it should because the o ring won't slide.

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