20 Most Recent Mi T M #WP-3400-4MRB 3400PSI Pressure Washer Questions & Answers

"just hasn't been run in a while"
The first thing to try is replacing the gas

if the motor cuts out, it is electrical, if the pump cuts out it may need a bypass unloader, or valves. If it has a soap valve, make sure it is closed because you may be sucking air

Check the wand tip for a tiny piece of debris like a tiny rock or something stuck in the tip.

Don't hit the stop button.

Ensure the membrane is protected with sand before laying the stone to avoid piercing the membrane.