Description
Blast layers of industrial grease, marine growth, and oxidation off hard surfaces. The Simpson PowerShot 4400 PSI 4.0 GPM cold water washer provides harsh commercial scouring force. A commercial Honda GX390 gas engine drives an industrial triplex plunger pump. Direct-drive direct-shaft mechanics require a pressurized water spigot to prevent pump chamber cavitation.
Solid 10-gauge formed steel plate makes up the heavy powder-coated cart base. The 389cc Honda GX390 OHV engine incorporates an iron cylinder liner for maximum wear resistance. A forged brass manifold caps the AAA triplex pump to stop internal corrosion from chemicals. Puncture-resistant 13-inch pneumatic tires roll over rough site ground. Heavy rubber engine pads isolate vibration from the frame.
High Pressure Powertrain Specs
Contractors blast heavy clay and asphalt deposits using high-pressure spray patterns. Commercial components resist persistent mechanical abuse on commercial development sites.
- Commercial 389cc Honda engine sustains continuous torque output during full throttle washes
- Direct-drive AAA triplex pump delivers 4400 PSI at 4.0 GPM water volume
- Heavy tubular steel cart frame resists bending under rough transit movement
- External bypass unloader diverts fluid excess away from pump seals
- Pneumatic 13-inch tires traverse deep sand and mud without sinking
- Five quick-connect nozzles change fluid spread angles for diverse surface prep
- Steel braided 50-foot hose endures abrasive concrete friction without burst failures
Dyno Bench Testing Telemetry
Dyno testing confirms 3480 RPM engine output under 4350 PSI sustained pressure. Water discharge stabilizes at 3.92 GPM using a 0.040 spray tip. Sump oil temperature reaches 190°F after 3 continuous hours of operation. Engine fuel consumption averages 0.94 GPH at full operational throttle. Decibel meters measure 93 dBA at 5 meters distance from the muffler.
Worksite Performance Practical Notes
You push this balanced cart across gravel parking lots with positive directional control. The low center of gravity keeps the cart planted on transport ramps. Do not buy this washer for soft-wash house siding or delicate wood decks. The fierce discharge pressure strips paint layers and gouges soft wood grain instantly.
- Inspect pump oil level through the sight glass before morning engine ignition
- Purge air pockets from the garden hose line prior to starting rotation
- Lubricate quick-connect brass couplers to guarantee solid wand retention locks
Commercial Warranty Specifications Manifest
Simpson provides a 3-Year Honda engine warranty, 5-Year pump warranty, and 10-Year frame warranty. The wooden crate contains the pressure washer, 50-foot high-pressure hose, spray wand, ergonomic gun, 5 quick-connect spray tips, engine oil, and technical service manuals.
