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Home/Mi-T-M JP-4004-3MHB Gas Pressure Washer – 4000 PSI, 3.5 GPM, Honda GX390
Mi-T-M JP-4004-3MHB Gas Pressure Washer – 4000 PSI, 3.5 GPM, Honda GX390

Mi-T-M JP-4004-3MHB Gas Pressure Washer – 4000 PSI, 3.5 GPM, Honda GX390

Brand: Mi-T-MSKU: JP-4004-3MHBIn stock
$2,701.00
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JP-4004-3MHB Gas Pressure Washer — JP Series 4000 PSI with Honda GX390

Buyers comparing the 3MHB (Honda GX390) variant against lesser JP models should note this is the only JP-4004 configuration; at 4000 PSI the AR pump requires the GX390's displacement to maintain rated flow under sustained load.

JP-4004-3MHB Cleaning Output and Engine Performance

The Honda GX390 is factory-recommended for commercial equipment at this output level and is the engine choice for buyers with established Honda dealer service relationships.

  • 4000 PSI at 3.5 GPM (14,000 CU) — the highest cleaning output in the JP Series; handles paint stripping and heavily fouled industrial surfaces
  • 389cc Honda GX390 OHV engine — commercial-duty displacement; Honda's global dealer network covers parts and service in most markets
  • AR crankshaft pump, forged brass manifold — crankshaft design sustains continuous-duty operation; brass manifold resists corrosion from mineral-laden water
  • ETL listed — independently verified for electrical and mechanical safety to US standards
  • Thermal relief valve and in-line water strainer — thermal valve prevents pump damage during trigger-closed idle; strainer catches particulates before they reach pump valves
  • 50-ft × 3/8-in non-marking hose, 48-in lance, 10-in flat-free tires — 50-ft reach covers most truck bays; flat-free tires maintain mobility regardless of debris on site

JP-4004-3MHB Applications and Environments

Fleet operations that service tanker trucks and bulk carriers benefit from the 14,000 CU output when stripping road film from large surface areas in a single shift. Property restoration companies use it on building facades before coating application. Municipalities apply it to graffiti removal from concrete and masonry where lower-output washers require chemical pre-treatment to compensate.

JP-4004-3MHB GPM, PSI, and Nozzle Configuration

Rated at 3.5 GPM at 4000 PSI (14,000 cleaning units) at rated flow. Includes quick-connect nozzles in 0°, 15°, and 25° patterns; 50-ft × 3/8-in non-marking high-pressure hose; 48-in lance with insulated trigger gun. Cold water only. 49-state engine — not for sale in California.

Specifications

PSI 4000 PSI at rated flow
GPM 3.5 GPM
Cleaning Units 14,000 CU (PSI × GPM)
Engine 389cc Honda GX390 OHV
Pump Type AR Crankshaft
Unloader Mi-T-M Adjustable Pressure
Hose 50 ft × 3/8 in non-marking
Lance 48 in
Nozzles Included 0°, 15°, 25° quick-connect
ETL Listed Yes
Net Weight 142 lbs
Dimensions (L × W × H) 40 × 22.5 × 24.5 in
Hot/Cold Cold water only
California Sale Not for sale in CA (49-state engine)
Pump AR
Shipping Weight 192.00 lbs.
Warranty 1 Year Mi-T-M Unloader, 3 Year Honda Engine, 7 Year AR Pump
Factory Options CX-0084 External Bypass System (must be ordered with unit and cannot be added later)

Documents

Spec Sheet
Manual

Video Overview

Product Warranty Information

Unloader1 year
Honda Engine3 years
Pump7 years

Warranty claims go through the manufacturer. Questions about coverage? Call +1 (978) 295-7538 or email info@uscleaningtools.com.

B2B & Tax-Exempt Purchases

We supply contractors, restoration companies, property managers, schools, government agencies, and other tax-exempt organizations.

How to place a tax-exempt order:

  1. Write to us through our Contact Us page or email info@uscleaningtools.com and attach your valid tax exemption certificate (state resale or exemption certificate).
  2. We verify your certificate and mark your account tax-exempt — usually within one business day.
  3. Place your order and sales tax will not be charged.

For volume pricing or purchase orders, call +1 (978) 295-7538.

Shipping & Returns

Free shipping on most brands for orders over $300, delivered to the lower 48 states. Any brand-specific freight rate is shown at checkout before you pay.

Processing & delivery: in-stock orders ship in 2–7 business days. Tracking is emailed within 24 hours of shipment. Built-to-order equipment shows its lead time on this page.

Freight deliveries: inspect your equipment on arrival and note any damage on the delivery receipt. Items damaged in transit or defective on arrival are fully covered at no cost to you.

Cancellations: cancel any time before your order ships. Refunds are issued for the order total minus a non-refundable payment processing fee, which may apply, so a cancellation is not always a 100% refund. No fee is deducted if we cancel the order or the item arrives damaged or defective.

30-day returns: return unused equipment in its original packaging within 30 days of delivery. Change-of-mind returns are subject to a restocking fee. To start a return, email info@uscleaningtools.com or call +1 (978) 295-7538.

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Mi-T-M JP-4004-3MHB Gas Pressure Washer – 4000 PSI, 3.5 GPM, Honda GX390Mi-T-M JP-4004-3MHB Gas Pressure Washer – 4000 PSI, 3.5 G...
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$2,701.00

Frequently Asked Questions

Why does the JP-4004 only come in the Honda GX390 configuration?
At 4000 PSI / 3.5 GPM the AR crankshaft pump requires the torque and displacement of the 389cc GX390 to maintain rated flow under sustained load.
What does ETL listed mean on the JP-4004-3MHB?
ETL listing means the JP-4004-3MHB was independently tested and certified by Intertek (ETL) to meet applicable US safety standards.
Is the JP-4004-3MHB suitable for paint stripping?
The JP-4004-3MHB at 4000 PSI and 14,000 CU can strip loose and peeling paint from concrete, masonry, and wood. For intact coatings on harder substrates, a surface cleaner attachment or chemical stripper pre-treatment will improve results. Always test on a small area first to confirm material compatibility.
Can the JP-4004-3MHB be sold in California?
No. The Honda GX390 on the JP-4004-3MHB is a 49-state engine that does not meet CARB small engine emissions regulations. It cannot be sold or operated in California.
What pump protection features does the JP-4004-3MHB include?
The AR crankshaft pump includes a forged brass manifold (corrosion resistant), thermal relief valve (releases water when trigger is held closed to prevent heat damage), and in-line water strainer (removes particulates before they reach pump valves). The Mi-T-M Pressure Relief Start unloader also allows engine start without pump pressure build-up.

Parts & Accessories That Fit the Mi-T-M JP-4004-3MHB Gas Pressure Washer

Confirmed-fit wear parts and accessories for this machine. Not sure which you need? Call 9782957538.

Part or accessorySKU
Mi-T-M AW-7500-0035 Pressure Washer Nozzle – Acc-Rotate 6000psi #3.5 AW-7500-0035
Mi-T-M AW-0050-0176 Pressure Washer Hose – 5/16x23' 4000psi Black AW-0050-0176
Mi-T-M 15-0270 Pressure Washer Hose – 3/8x50' 4000psi R1 Black 15-0270
Mi-T-M 15-0277 Pressure Washer Hose – 3/8x25' 4000psi Black 15-0277

How the Mi-T-M JP-4004-3MHB Gas Pressure Washer Compares to Other Mi-T-M pressure washers

The closest 5 models from the 107 Mi-T-M pressure washers we carry, by capacity. Not sure which size fits the job? Call +1 (978) 295-7538.

This modelMi-T-M JP-4004-3MHB Gas Pressure Washer Mi-T-M JP-4004-3MHB Gas Pressure Washer
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Price$2,701$2,534$2,648$2,670$2,685
Pressure4,000 PSI3,600 PSI3,600 PSI4,000 PSI4,000 PSI
Flow3.5 GPM2.8 GPM2.8 GPM3.5 GPM3.5 GPM
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