Hey thanks guys for all the info on lubing the uploader valve.I have had the same problem for years on my Karcher /Costco pressure washer.Once again I started it up and had no pressure,. I followed the instructions to lube and reinstall the valve and voila it worked great and I used my machine all afternoon.This was after being told that it was a piece of junk and should be replaced by still another small motor repair shop.

Thanks so much. I pulled it apart, greased the uploader valve and it is working great

Anybody know where the unloader valve is on this Karcher power washer? See several views of it at the link below.

It is not unloading, it kills the engine when you release the trigger. Works good until then, lots of pressure. Thanks for any help.

Here is a link that might be useful: Power Washer