Work Pro® Series Gasoline Direct Drive Pressure Washer (Model WP-4200-0MHB)

Model: WP-4200-0MHB
Series: Work Pro®
Engine Manufacturer: Honda
Type: Gasoline Direct Drive Pressure Washer

The Work Pro® WP-4200-0MHB Gasoline Pressure Washer is a high-output professional cleaning machine designed for users who demand maximum pressure and flow for tough jobs. Delivering 4,200 PSI at 3.4 GPM, this unit is ideal for removing heavy mold, mildew, dirt, and grime from concrete, large driveways, equipment, trailers, and demanding property maintenance applications.

Powered by a 389cc Honda GX390 OHV engine and paired with a Mi-T-M crankshaft pump, the WP-4200-0MHB delivers outstanding durability, smooth operation, and long service life. The Mi-T-M Pressure Relief Start system reduces starting resistance, while the brass pump manifold, adjustable pressure unloader, and thermal relief valve provide precise control and pump protection. A powder-coated steel frame with 10-inch flat-free tires ensures rugged mobility on job sites and uneven terrain.

Key Features

• 4,200 PSI / 3.4 GPM for heavy-duty professional cleaning

• Honda GX390 OHV engine for proven reliability and power

• Mi-T-M crankshaft pump with brass manifold

• Mi-T-M Pressure Relief Start for easier engine starting

• Built-in low-pressure detergent injector

• Adjustable pressure unloader for precise cleaning control

• 50-ft x 3/8" wire-braided hose for extended reach

• Powder-coated steel frame with 10-inch flat-free tires

Pump & Engine

• Engine: 389cc Honda GX390 OHV

• Pump: Mi-T-M Crankshaft

• Manifold: Brass

• Unloader: Adjustable pressure

• Protection: Thermal relief valve

• Filtration: In-line water strainer

Included Accessories

• Quick-connect nozzles: 15°, 25°, and detergent

• 50-ft x 3/8" wire-braided high-pressure hose

• Two-piece 36" lance with trigger gun

Specifications

Weights & Dimensions

Ideal Applications

• Heavy-duty driveway and concrete cleaning

• Mold and mildew removal

• Fleet vehicles, trailers, and equipment

• Farm, ranch, and property maintenance

• Professional residential and light commercial use

Warranty

• 1-Year Mi-T-M Pump Warranty

• 3-Year Honda Engine Warranty

Compliance & Notes

• 49-state engine – not for sale in California

• California sales require CARB-compliant engines (consult factory)