Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Is pressure building? If pressure is ok, the pressure switch is not working. It is what cycles the pump motor on and off.
The pump will not be damaged as long as it has water ! Is it pumping water?
A worn impeller will keep it from building pressure.
The pressure switch can be adjusted down so it cuts off on lower pressure.
Pressure switch will have adjustment for lowering the tension in the cutoff switch.
The pressure switch is where the electrical comes into the unit! It has to have one!
# ***** on parts list.