When a pressure washer loses pressure and rebuilding the old pump no longer pays, a complete pump kit gets the machine back to work. The Simpson 90028 OEM Technologies axial cam pump produces up to 3300 PSI at 2.4 GPM and bolts onto horizontal-shaft gas engines, so operators can restore full cleaning power in a single swap.
Built for
Pressure washing pros and equipment owners replacing a worn axial pump on a gas washer with a horizontal engine and a 3/4 in diameter shaft, such as Kohler SH270 and Honda GC160/190.
Common uses
- Replacing a worn or failed axial cam pump to restore lost pressure
- Upgrading a tired residential pump to a longer-life OEM Technologies unit
- Getting a hard-working gas washer back in service with a bolt-on kit
Specifications
- Up to 3300 PSI at 2.4 GPM
- Fits horizontal-shaft gas engines with a 3/4 in diameter shaft (e.g. Kohler SH270, Honda GC160/190)
- Stainless steel pistons for longer seal life
- Integrated stainless unloader with easy-start system
- Maintenance-free crankcase in fully anodized die-cast aluminum
- Thermal Relief Valve to protect against overheating in bypass
- Garden hose inlet and M22 threaded high-pressure outlet
- Kit includes siphon tube with filter, mounting bolts, shaft key, and instructions
- 2-year limited warranty
Frequently asked questions
Will the Simpson 90028 fit my pressure washer?
It mounts to gas engines with a horizontal shaft and a 3/4 in diameter shaft, including Kohler SH270 and Honda GC160/190. Confirm your engine's shaft size and mounting before ordering.
What is the thermal relief valve for?
The TRV protects the pump when it runs in bypass with the trigger closed. It releases small amounts of hot water and draws in cooler water so the pump does not overheat.
What comes in the kit?
The kit includes the pump with an integrated unloader plus a siphon tube with filter, mounting bolts, a shaft key, and an instruction booklet.
Does it handle hot water?
This is a cold-water axial pump. It uses stainless pistons and a thermal relief valve for durability, but it is not rated for hot-water feed.
Discount Cleaning Products is an authorized dealer with US-based support, so you get the genuine part backed by real people who know the equipment. Order with confidence and keep your operation running.
