After turning off the pressure washer i noticed a gray color fluid on the ground under the machine. did not lose any pressure when i was using it.
Gray fluid is usually indicative of old oil with water mixed into it. First you have to determine if the fluid is coming out of the motor or pressure pump. Then change the oil in that, or both, and then watch the condition of the oil when you use the washer. With new oil, it won't turn gray but will get a milky coloration to it. There shouldn't be any way for water to get into the motor oil short of the engine being sprayed directly with high pressure water. If water is getting into the pump oil you'll have to check the seals inside the pump.
SOURCE: no pressure on Honda 2400psi pressure washer
spill valve aka unloader valve is stuck needs to be cleaned and lubricated with grease re instaled
SOURCE: My Troy Bilt power washer (using Honda GCV160
I had a similar problem. Turns out I had left the hose disconnected and some sort of wasp built a paper type nest inside the washer tube that the hose connects to. I had to take the pump off and take apart and then cleaned it out with a screw driver. Not too easy to do but finally got it clean. Same thing happened with the hose.
So, if you haven't used it for awhile, check that there is no blockage in the hose or pump tubes. You might be able to blow it out with an air compressor.
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