GX390 Honda 4 GPM 4200 PSI Commercial Pressure Washer HD AR Pump D4042HA
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Overview
This is a commercial cold-water pressure washer rated at 4200 PSI and 4.0 GPM, built on a Honda GX390 engine driving a heavy-duty AR triplex plunger pump. Power runs through a direct-drive coupling, so there are no belts or pulleys to align or replace. The frame is aircraft-grade aluminum with dual handles, keeping the unit lightweight, rust-proof, and easy to move on flat-free tires. It's built for contractors and crews doing all-purpose cleaning who need reliable output and minimal downtime in the field. Low-oil shutdown protects the engine and a thermo-sensor guards the pump against overheating in bypass mode.
What's included
- Honda GX390 engine with low-oil shutdown
- Heavy-duty AR triplex plunger pump
- Direct-drive power transfer — no belts or pulleys
- Aircraft-grade aluminum frame with dual handles and lifetime frame warranty
- 50-mesh inlet filter and adjustable pressure unloader
- Thermo-sensor prevents overheating in bypass mode
- Flat-free tires, dual padded shock-absorbing feet, 3/4" cold-rolled steel threaded axle
- 50 ft 4200 PSI hose, 5000 PSI gun with 42" molded-grip lance, and 10% downstream chemical injector — all with quick connects
Heavy Duty
Best for: driveways, concrete, paint stripping, commercial degreasing
Specifications
- Pressure (PSI)
- 4000 to 4999
- Flow (GPM)
- 4.0 to 4.9
- Engine
- Honda
- Horsepower
- 10 to 15
- Drive
- Direct
- Pump
- AR triplex plunger (heavy duty)
- Frame
- Aircraft-grade aluminum
- Hose Length
- 50 ft (rated 4200 PSI)
- Axle
- 3/4" cold-rolled steel, threaded
- Inlet Filter
- 50 mesh
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