APSSKU: B4042HA

GX390 Honda 4 GPM 4200 PSI Heavy Duty AR North America V-Belt Drive B4042HA

Name: GX390 Honda 4 GPM 4200 PSI Heavy Duty AR North America V-Belt Drive B4042HA
Brand: American Pressure Systems
SKU: B4042HA
Price: 1799 USD
Availability: InStock

4000–4999 PSI4.0–4.9 GPMHonda

$1,79900

Freight delivery · free to a business with a forklift or dock · $99 to a residence

Financing available. Apply now with Clicklease

VisaMastercardAmexDiscoverZelle & ACH also accepted — call 800-493-7692

A 2% fuel surcharge and 3.9% processing fee are added at checkout.

Ready to ship

Freight · free to a business

Warranty

Financing available

Low Price Guaranteed

Found it cheaper somewhere else? We'll match it. Call 800-493-7692 and we'll beat the deal.

Overview

The B4042HA is a Honda GX390-powered, belt-drive cold water pressure washer rated at 4200 PSI and 4 GPM. It pairs the GX390 with an AR North America industrial triplex pump run at low RPM off a belt drive, which reduces heat and wear versus a direct-drive setup and helps the pump last longer under daily commercial use. It's built for contractors and industrial operators who need high pressure and high flow in a compact, cart-mounted unit. The frame is aircraft-grade aluminum with dual handles and no welds, carrying a lifetime frame warranty. Every unit ships factory-assembled and tested in the USA, ready to run.

What's included

Honda GX390 commercial/industrial engine
AR North America industrial belt-drive pump, low RPM for longer life
Aircraft-grade aluminum frame, dual handles, no welds to fail
Lifetime frame warranty
EZ start with external bypass
Low-oil shutdown protects the engine
Adjustable pressure unloader
50 mesh inlet filter
Thermo-sensor prevents overheating in bypass mode
Flat-Free HD tires and dual padded shock-absorbing feet
3/4" cold-rolled steel threaded axle
Factory-assembled and tested in the USA, ready to operate

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: Belt
Pump: AR North America (industrial)
Frame: Aircraft-grade aluminum
Axle: 3/4" cold-rolled steel, threaded
Inlet Filter: 50 mesh

Frequently asked questions

Belt drive runs the pump at a lower RPM than the engine, which cuts heat and wear so the pump lasts longer under heavy daily use. On the B4042HA the GX390 turns the AR North America pump through a belt rather than being coupled directly to the crankshaft, a setup favored for commercial and industrial work.

The B4042HA is a cold water unit. It runs at 4200 PSI and 4 GPM off the Honda GX390 engine, with no burner or heating coil.

Yes. All units are completely factory-assembled, tested in the USA, and delivered ready to operate.

The low-oil shutdown automatically stops the engine if oil drops to a low level during operation, protecting it from damage. The unit also includes a thermo-sensor that prevents the pump from overheating while in bypass mode.

Talk to a real expert

Our equipment experts

150+ years combined on the equipment

Talk to someone who actually knows the machine

Skip the chatbot maze. Call and you get a specialist who can size the right unit, match the exact part, and match the right sealer. Usually faster than figuring it out yourself.

Mon–Fri 8am–5pm ET Family-owned, US-based

800-493-7692 Message an expert