I have a 5 year old Craftsman pressure washer with a Honda gas engine Model Number 580.768350. When I start the machine up and press the nozzle it has great pressure but once I release the nozzle to do something else and go to press it again there is no longer any pressure. If I stop the machine and restart it there is pressure again but only for one press.

Please advise what part might the problem or any troubleshooting ideas would be great.

Thanks

Your unloader valve is sticking or not working. Take your model number to a Sears parts store and buy a new one for about $15.00.

This fixed mine / although I have a Briggs engine..

Or you could just go to sears.com with model number and order.