My Briggs & Stratton pressure washer will start and run fine if I do not have the pressure hose attached. If I do have the pressure hose attached, water flows freely through it when the engine is not on. As soon as I start the engine, it all appears to work fine (water flow is good), but then the engine cuts off. It is as if there is too much pressure when the hose is attached. I've just had a general service done on the unit, but did not take the hose/wand in when I had this service done. I live in South Florida, so hose freezing shouldn't be an issue.
Hey mate,
It sounds like your bypass valve/unloader valve is sticking when pressure builds up in the lance,hose and head the pressure cleaner changes to a recirculate mode so it does not blow out hoses or seals or causes any damage to the unit, the bypass valve is the component that activates this sequence if that valve is stuck it will just try to continue to create pressure which in turn puts load on the engine and stalls it...
That is why it starts up straight away and only when it builds up pressure is when the engine stalls.
You would be best taking this to a qualified pressure cleaner technician as there are alot of little parts and orings plus the the head will need cleaning up and the bypass valve lubed, they may not of seen this at the service as it is hard to test a unit without the suited hose and lance... Often use will help this problem when a unit sits for a period of time that will cause issues such as this!!!
Regards
Brad:)
your pressure cut out switch is faulty. locate the wire that is runing into the housing or body of the motor. disconnect that!if that resolves the problem continue using this way while checking the oil or re-connect after running the machine for a while and it may start working again!
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