RPM ON MOTOR TOO LOW

 This applies to gas or diesel engines and Hydraulic Powered Pressure Washers. 

Electric Pressure Washer motors have a fixed speed, matched to your pump.  If you are replacing a pump or electric motor make sure you know the rated speed of your drive or pump.  

Virtually all gas motors run at 3400 to 3500 RPM.  If you have a direct drive pump it is designed to run at this speed.  

Most belt or gear driven pumps run at 900 to 1750 RPM, but the gas engine still runs at 3400.  Pulley sizes or gearing reduces the pump RPM to it's particular operating speed.

Modern small diesel engines built for the pressure wash industry are designed to run at 3400 RPM while more expensive, larger diesels run at slower speeds.  If you are not sure, check with the engine manufacturer.

Hydraulic powered pressure washer speed is a little more complicated.  The speed of the hydraulic motor is controlled by the pressure and flow of the hydraulic oil supply. 

Hydraclean Hydraulic Pressure Washers have a pressure compensated flow control which compensates for various oil gpm/psi.  If you are looking to get a hydraulic system check out the Hydraclean web site.   

Whatever you do, don't over-speed the pump.  This will, at best, break your pump. At worst, it will damage you or someone around you.   

Click here to see various direct drive, pulley and gear drive pressure washers.