I purchased a gas Karcher 3200 pressure washer that done that out of the box. None of the suggestions they give will fix the issue. Its a fault of the mfg and we pay the price for their mistakes.
I paid more than 424.00 for mine and have tried to unsuccessfully use it 4 times and became so frustrated that I just quit.
I will have to purchase another pressure washer but you can rest assured that Karcher will never be considered again.
JoeMM