Mi-T-M JP-4004-3MHB Gas Pressure Washer – 4000 PSI, 3.5 GPM, Honda GX390
JP-4004-3MHB Gas Pressure Washer — JP Series 4000 PSI with Honda GX390
The JP-4004-3MHB is the highest-output model in Mi-T-M's JP Series, producing 4000 PSI at 3.5 GPM — 14,000 cleaning units — from a 389cc Honda GX390 OHV engine paired with an AR crankshaft pump. At 14,000 CU it delivers 56 percent more cleaning power than a standard 3000 PSI / 3.0 GPM unit and is ETL listed for US use. 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
At 14,000 CU the JP-4004-3MHB handles jobs that exceed the capacity of 3500 PSI units — stripping loose paint from concrete block, washing enclosed trailers that carry livestock or agricultural product residue, and cleaning large building facades in fewer passes. 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
Industrial cleaning contractors use the JP-4004-3MHB where 3500 PSI units leave contaminant behind — paint prep on concrete and masonry, washing heavily fouled livestock trailers, and cleaning chemical plant exteriors. 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) |
Documents
Video Overview