Key Features
Hot Water Cleaning PowerThis hot water pressure washer delivers 3,500 PSI at 3.3 GPM, giving you the pressure and rinse volume needed to break loose grease, oil, and packed-on grime faster than cold water alone. Honda GX390 PowerThe 389cc Honda GX390 OHV engine gives this gasoline direct drive unit the kind of dependable power commercial users want when the washer needs to run hard and keep working. Built for the JobsiteA reinforced powder coated steel frame, center-balanced lift, and 13-inch flat-free tires make it easier to move around equipment yards, shops, and rough ground without babying the machine.
Overview
The Mi-T-M HSP-3504-3MGH HSP Series 3500 PSI Gasoline Direct Drive Hot Water Pressure Washer is a commercial hot water pressure washer built for heavy cleaning where cold water is not enough. This is a hot water pressure washer designed for removing grease, oil, mud, and stubborn grime from equipment, garage floors, and workshop surfaces. Model Number: HSP-3504-3MGH. If you clean construction equipment, agricultural machines, shop floors, or service areas, this machine is aimed squarely at that kind of work.
Its core numbers are what matter on the job: 3,500 PSI and 3.3 GPM. That gives you strong cleaning force without dropping into a low-volume machine that takes forever to rinse. The hot water system adds a major advantage when you are dealing with oily residue, grease film, and baked-on mess that does not want to let go. Mi-T-M also lists a temperature rise of 150°F above ambient with a maximum outlet temperature of 200°F, which tells you this unit is built for real degreasing work, not just blasting off loose dirt.
Power comes from a 389cc Honda GX390 OHV engine, a proven choice for commercial gas equipment. On a pressure washer in this class, that matters because engine reliability is not a nice extra, it is the whole game. This model uses a direct drive setup and an AR pump with a forged brass manifold, a preset stainless-steel and brass unloader valve, and a thermal relief valve. In plain terms, those are the parts you want to see when you are buying for durability and steady daily use, not occasional weekend cleanup.
Mi-T-M’s Electro Magnetic Firing system is one of the more important design details here. According to the product information, it eliminates the need for a 12-volt battery to operate the burner. That means less complication in the field and one less thing to keep charged or troubleshoot. The top-fired powder coated heat exchanger and diesel or kerosene fired burner are there to keep the hot water side doing its job when you need cutting action against oil and grease.
Jobsite practicality is handled well. The frame is reinforced powder coated steel with a center-balanced lift, plus 13-inch flat-free tires for moving over uneven ground. You also get a low pressure detergent injector, which is useful when you want chemical help before rinsing. The included 50-foot by 3/8-inch steel wire-braided hose gives you working reach around larger equipment, and the adjustable pressure insulated dual lance with trigger gun helps you control the stream without constantly swapping setups.
This Mi-T-M pressure washer is best suited to commercial users, service departments, contractors, farm maintenance crews, and shop owners who routinely clean equipment and hard surfaces contaminated with grease or mud. It is probably more machine than a homeowner needs, but for a buyer who makes money with cleaning speed and reliability, the Mi-T-M HSP-3504-3MGH HSP Series 3500 PSI Gasoline Direct Drive Hot Water Pressure Washer is set up the right way from the start.
Built to Cut Through Grease and Mud
This washer is set up for the kind of cleaning that eats time when you are using the wrong machine. Hot water, strong pressure, and commercial-grade components work together to speed up cleanup on oily equipment and dirty work areas.
- 3,500 PSI and 3.3 GPM for heavy-duty rinsing and surface cleaning
- Up to 200°F maximum outlet temperature with a 150°F temperature rise above ambient
- Low pressure detergent injector helps when grease needs chemical help before rinsing
What’s in the Box
- (1) Mi-T-M HSP-3504-3MGH hot water pressure washer
- (4) Quick connect nozzles: 0°, 15°, 25°, and 40°
- (1) 50-foot x 3/8-inch steel wire-braided high pressure hose
- (1) Adjustable pressure insulated dual lance
- (1) Professional-grade insulated trigger gun with safety lock-off
Key Specifications
| Maximum Pressure (PSI) | 3,500 PSI |
|---|---|
| Flow Rate (GPM) | 3.3 GPM |
| Engine | 389cc Honda GX390 OHV |
| Pump Brand | AR |
| BTU Per Hour | 294,000 BTU |
| Engine Fuel Tank Capacity | 1.61 gal |
| Burner Fuel Tank Capacity | 5.5 gal |
| Net Weight | 428 lbs |
Built For
Commercial CleaningConstruction EquipmentAgricultural EquipmentGarage FloorsWorkshopsService ShopsMaintenance CrewsHeavy Mud and Grease Removal
Pro Tip
Use the hot water function and detergent injector to loosen grease first, then switch to the right quick-connect nozzle for the rinse. That usually cleans faster than trying to brute-force oily buildup with pressure alone.
Tool Nut’s Take
Tool Nut’s Take
Mi-T-M HSP-3504-3MGH hot water pressure washer means business
If you are cleaning greasy equipment or nasty shop floors on a regular basis, this is the kind of pressure washer that saves time where cheaper cold-water units just make noise.
- Who it’s for: Contractors, equipment fleets, farm shops, and commercial users who need a gasoline-powered hot water pressure washer for serious cleanup.
- Why it stands out: The Honda GX390 engine, AR pump, EMF firing system, and real hot water capability make it a strong setup for grime that does not wash off easily.
- Worth knowing: This is a large commercial machine at 428 lbs net weight, so buy it because you need the performance, not because you want something light and compact.
Common Questions
- Is this a hot water or cold water pressure washer? This is a hot water pressure washer with a listed maximum outlet temperature of 200°F.
- What engine does it use? It uses a 389cc Honda GX390 OHV engine.
- What kind of burner fuel does it use? The burner is designed for No. 1 or No. 2 diesel or kerosene and is not approved for bio-fuel.
- Is this meant for home use or commercial use? Product data identifies it as a commercial pressure washer and the stated applications focus on equipment, garages, and workshops.
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