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Rick, Small Engine Technician
Category: Small Engine
Satisfied Customers: 3844
Experience:  Outdoor Power Equipment technical trainer since 1990, covering eight states.
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My Karcher pressure washer does not maintain full pressure.

Customer Question

My Karcher pressure washer does not maintain full pressure. After 2 - 5 seconds pressure reduces. When using the dirt blaster lance, pressure is so low that the water jet simply makes a circular pattern on the patio (I guess this is due to the ball bearing in the nozzle moving so slowly because of the low water pressure). I don't think the problem is due to a blockage because the machine works at full power for the first 2 - 5 seconds every time the trigger is pulled.What could be the cause? Lyn Evans
Submitted: 2 years ago.
Category: Small Engine
Expert:  Curtis B. replied 2 years ago.
Have you removed the screen on the inlet connection? It may be plugged with debris, keeping the water from entering the pump in sufficient quantity to maintain pressure.