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Small Engines (Lawn Mowers, etc.): Craftsman 5 yr. old pressure washer, briggs stratton, pressure washer

Question
6.75 hp, 2550 psi, model#580.752330, Ser# 1011129159. Engine was running fine for about 1 hour,then stopped while spraying.
Restarted engine, ran fine until the wand trigger is pulled, then quits running. That kind of cycle worked three times, then engine quit and now won't restart.Suspect faulty pump, but I'm no expert on the matter.

Answer
Small Engines (Lawn Mowers, etc.): Craftsman 5 yr. old pressure washer, briggs stratton, pressure washer

unloader OZ
The problem may be the unloader valve,how this works is when you are spraying water the pressure is being released to the nozzle. Once you shut the trigger off the unloader valve releases the built up pressure in the pump by circulating the water in the pump,thus not allowing the pump to build up to much pressure to shut the engine down.
The part #190594GS is a BRIGGS & STRATTON UNLOADER VALVE
we carry them in our store the price is $50.25
also you can go to Sears parts and enter the Model # 580.75233

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