Why is my pressure washer motor pulsing and losing consistent water pressure?

Why is my pressure washer motor pulsing and losing consistent water pressure?

A pulsing or surging motor is a common problem that usually signals a sudden disruption in the machine’s water flow. The primary culprit is often a restricted water supply, which can be caused by a kinked garden hose or a clogged water inlet screen filter. When the pump cannot pull enough water, it starves, causing the engine to surge erratically. Another frequent cause is a tiny piece of dirt trapped inside the unloader valve or a partially blocked spray tip nozzle. To troubleshoot this issue, clear out any debris from your nozzle tip using a small needle, clean your intake filters, and verify that your spigot provides the full flow rate your machine requires to function smoothly.