The Simpson AAA 90039 is a bolt-on replacement triplex plunger pump kit for gas pressure washers with a horizontal engine and a 1-inch shaft, such as the Honda GX270. It is rated to 4000 PSI and up to 3.5 GPM and includes PowerBoost technology for higher pressure at the nozzle. For contractors and property crews, dropping in a fresh triplex pump brings a worn machine back to full cleaning power for a fraction of the cost of a new unit.
Use cases
- Replace a worn or failed pump on a gas pressure washer with a 1-inch horizontal shaft
- Restore up to 4000 PSI cleaning power on contractor and property-maintenance machines
- Upgrade to a durable triplex pump for long runtimes in tough environments
- Fit common horizontal engines such as the Honda GX270 with the included hardware
Specifications
- Max pressure: 4000 PSI
- Max flow: up to 3.5 GPM (rated 3.3 to 3.5 GPM depending on setup)
- Shaft: 1-inch horizontal, SAE standard bolt pattern
- Dual oversized ball bearings for reduced friction and long life
- Stainless steel integrated unloader with easy-start system and PowerBoost technology
- Includes siphon tube with filter, mounting bolts, shaft key, and instructions
Frequently asked questions
What engines does the 90039 fit?
It fits gas pressure washers with a horizontal engine and a 1-inch diameter shaft, such as the Honda GX270, using its SAE standard bolt pattern.
What is included in the kit?
The kit includes the pump, a siphon tube with filter, mounting bolts, a shaft key, and an instruction booklet for a bolt-on install.
What does PowerBoost technology do?
PowerBoost delivers higher pressure at the nozzle for more efficient cleaning, and a hand-turn knob lets you reduce power for lighter tasks.
What are its pressure and flow ratings?
It is rated up to 4000 PSI and up to 3.5 GPM, making it suited to heavy contractor and industrial cleaning.
Discount Cleaning Products is an authorized dealer with US-based customer service. Order online or reach our team for help matching this part to your machine.
