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Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 29110
Experience:  Service manager and technician for all brands of engines with 40 + years of experience.
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With all connections made and the trigger pulled I get a on

Customer Question

With all connections made and the trigger pulled I get a on /off, on /off spurt from the lance until the lance is adjusted to "Min"
Submitted: 2 years ago.
Category: Small Engine
Expert:  Curtis B. replied 2 years ago.
Check the inlet hose connection, it should have a screen it it , to keep trash and bugs out. See if the screen is clean. It starves the pump for water and will give erratic pump pressure.
Customer: replied 2 years ago.

I have now done this and the screen was clear. I even tried without the screen.

Still no success

Expert:  Curtis B. replied 2 years ago.
OK, do you have parts list? Look at your spill valve/ unloader valve. It may be sticking. will need to be removed and lubed.