I built a support which lifts the tank outlet closer to the inlet height of the pump inlet. It raises the tank about 18 inches and appears to solve the problem. The pump isn't designed to provide suction for the inlet, however if all the air is removed from the line it will work fine without cavitating. Another solution is to provide an in-line pump to pressurize the inlet side. Not so easily to match the needed flow rate and needs a source of power. Hence the support!
NorthStar Hot Water Pressure Washer Skid with Wet Steam, 3000 PSI, 4 GPM, Honda Engine, 100-Gal. Water Tank

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Shipping:
Free shipping (lower 48 states) - Available nowHeavy/large item. Lift gate service available.
Store Pickup:
Not available - online only
- 250°F wet steam mode optimizes performance with combination of high heat, high impact and high flow rate
- Industry-leading 150° temperature rise for more effective hot water pressure washing and degreasing
- Innovative digital thermostat provides far superior temperature regulation compared to other brands — a stable 15°–18°F range delivers consistently hot water without significant temperature swings
- Downdraft burner with seamless coil provides consistent heat and up to 35% increased fuel efficiency
- Adjustable digital thermostat provides extremely accurate temperature regulation
Prop 65 Warning: See Details
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Description
Key Specs
Reviews
Q & A
Accessories
Warranty
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Product Summary
What's Included
- (1) Hot water pressure washer with wet steam (5) Nozzles (1) High-pressure hose (1) Spray gun (1) Lance
Downloads
READY FOR REMOTE JOBS
A full-featured 100-GAL. WATER TANK ensures you can tackle even the most remote jobs without needing immediate access to a water source, complemented by smart safety features
ECONOMIC AND EFFICIENT
Enjoy superior fuel economy with a downdraft burner system that not only saves on costs but also maximizes HEATING EFFICIENCY FOR QUICKER, MORE EFFECTIVE CLEANING
UNMATCHED CLEANING POWER
Leverage 250°F WET STEAM alongside an industry-leading 150° TEMPERATURE RISE, ensuring high-impact cleaning that easily dissolves the toughest substances
RELIABLE AND QUIET OPERATION
THE HONDA GX390 ENGINE, coupled with a CAT DIRECT DRIVE PUMP, delivers quiet, reliable performance, making demanding tasks more manageable
PRECISE TEMPERATURE REGULATION
Benefit from an innovative DIGITAL THERMOSTAT offering unmatched TEMPERATURE STABILITY, for consistent, effective cleaning without temperature fluctuations
Features + Benefits

- 250°F wet steam mode optimizes performance with combination of high heat, high impact and high flow rate
- Industry-leading 150° temperature rise for more effective hot water pressure washing and degreasing
- Innovative digital thermostat provides far superior temperature regulation compared to other brands — a stable 15°–18°F range delivers consistently hot water without significant temperature swings
- Downdraft burner with seamless coil provides consistent heat and up to 35% increased fuel efficiency
- Adjustable digital thermostat provides extremely accurate temperature regulation
- AFI (Air/Fuel/Ignition) delivery system eliminates need for 12 Volt battery
- 100-gal. water tank with auto shutoff prevents overflowing while filling
- Downstream chemical injector protects pump seals
- Extensive vibration isolation means the unit will run smoother, quieter
- Heavy-duty Grade 50 steel skid frame for rugged durability
- Mounts in truck, trailer or utility wagon
- Includes 3/8in. x 50ft. high-pressure hose, rear entry spray gun and 18.5in. lance and 5 nozzles (15° wet steam, 15°, 25°, 40 and detergent)
- 2-year limited warranty on frame; 3-year limited warranty on Honda engine; 5-year limited warranty on pump; 5-year limited warranty on heat exchanger
Key Specs
| Attribute | Specification |
|---|---|
item# | 157116 |
Brand | NorthStar |
Manufacturer's Warranty | 2 year limited warranty |
Ship Weight | 620.0 LB |
Pressure | 3,000 PSI |
Flow | 4 GPM |
Engine Brand | Honda |
Engine Model | GX390 |
Engine Displacement | 389 cc |
Fuel Type | Gasoline |
Pump | CAT 66dx |
Drive Style | Direct |
Number of Tips Included | 4 |
Adjustable Pressure | Yes |
Gross Torque | 18.5 ft-lbs. |
Start Type | Recoil |
Engine Oil Included | No |
| Attribute | Specification |
|---|---|
Engine Oil Type | SAE 30 Motor Oil |
Fuel Capacity | 1.61 Gal |
Max. Inlet Water Temp | 140 °F |
Max. Outlet Water Temp | 250 °F |
Orifice Size | 4.5 |
Chemical Injector | Yes |
Hose Length | 50 ft |
Coupler Size | 3/8 in |
Nozzle Type | 15° Wet Steam, 15°, 25°, 40°, and Chemical |
Quick Connect Nozzle | Yes |
Pump Oil Included | Yes |
Pump Oil Type | SAE 30 Nondetergent |
Low Oil Shutdown | Yes |
Thermal Protector | Yes |
Product Weight | 610.0000 lb |
Dimensions L x W x H (in.) | 47.5 x 61.5 x 47.875 in |
Reviews
Questions & Answers
Questions
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· 5 years ago
How much water is needed in the 100gal tank to provide sufficient water pressure to the pump, can it be ran off just the tank?
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BillyWillieBillWilliamBob· a year ago
Helpful?
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NorthstarExpert12· 5 years ago
This pressure washer skid can operate off the tank only. It would need a minimum of 25 gallons to operate without losing pressure.
Helpful?
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· 2 months ago
Can this be mounted on a trailer?
1 answer-
NorthstarExpert12· 2 months ago
This pressure washer skid can be mounted on an open trailer. It should not be mounted in an enclosed trailer.
Helpful?
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· 4 months ago
what fuel is the heater? and how is it started if it doesn't have a battery?
1 answer-
NorthstarExpert12· 4 months ago
The burner can use diesel, kerosene, or fuel oil. The machine is equipped with a recoil (pull-start) starter.
Helpful?
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· 4 months ago
What size of the fork holes? depth, width and height. please
1 answer-
NorthstarExpert12· 3 months ago
The fork pockets measure 5" wide x 2" high and extend the length of the skid. They are 12.85" apart.
Helpful?
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· 7 months ago
Good morning, checking to see if this comes with an electric start and or can you add that to it?
1 answer-
NorthstarExpert12· 7 months ago
The engine of this pressure washer has a recoil (pull) start only. An electric starter kit is not available and modifications to this unit would void the warranty.
Helpful?
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· a year ago
Do you make a cover for this unit ?
1 answer-
NorthstarExpert12· a year ago
A cover is not available for this pressure washer.
Helpful?
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· a year ago
Can u add a soft wash system to it
1 answer-
NorthstarExpert12· a year ago
This pressure washer system is not designed to work with a soft wash system. Bleach would damage the pump of this pressure washer.
Helpful?
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· a year ago
Hi what it's Demetion? And weight?
1 answer-
NorthstarExpert12· a year ago
The overall dimensions of this pressure washer are 47.5" long x 61.5" wide x 47.87" high. The dry weight is 610 lbs.
Helpful?
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· 2 years ago
Does the burner need to be plugged in or does it run of battery
1 answer-
NorthstarExpert11· 2 years ago
The pressure washer will have a continuous igniter that is stator driven and will continually ignite as the engine is running.
Helpful?
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· 2 years ago
Does this come with wand and hose
1 answer-
NorthstarExpert12· 2 years ago
This pressure washer skid includes five nozzles, a high pressure hose, a spray gun and a lance.
Helpful?
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Accessories We Recommend
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Warranty
Manufacturer's Warranty
2 year limited warranty
Extend Your Warranty Coverage with a Northern Protection Plan (NPP)
Repair Plan — 1 Year
A Northern Protection Plan is available after adding the product to your shopping cart.
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Item # 157116
$5299.99Shipping:
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Item # 157598
$7999.99Reg $8999.99Save $1000.00Order today to get this price.
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Free shipping (lower 48 states) - Available nowHeavy/large item. Lift gate service available.
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- $5999.99
Shipping:
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Specifications
3,000 PSI
4,000 PSI
3,500 PSI
3,000 PSI
4 GPM
7 GPM
3.5 GPM
4 GPM
Honda
-
Honda
Northstar
GX390
Command Pro V-twin
GX390
E420
389 cc
725 cc
389 cc
420 cc
Gasoline
Gasoline
Gasoline
Gasoline
CAT 66dx
Northstar
CAT 66dx
CAT 66dx
Direct
Belt
Direct
Direct
4
-
5
5
Yes
Yes
Yes
Yes
18.5 ft-lbs.
38.4 ft-lbs.
19.5 ft-lbs.
19.5 ft-lbs.
Recoil
-
Electric and Recoil
Recoil
No
No
No
No
SAE 30 Motor Oil
SAE 30 Motor Oil
SAE 30
SAE 30 Motor Oil
1.61 Gal
15 Gal
8 Gal
1.61 Gal
140 °F
140 °F
140 °F
140 °F
250 °F
200 °F
250 °F
250 °F
4.5
3.5
4
4.5
Yes
Yes
Yes
Yes
50 ft
50 ft
50 ft
50 ft
3/8 in
3/8 in
3/8 in
3/8 in
15° Wet Steam, 15°, 25°, 40°, and Chemical
0°, 15°, 25°, 40° and Soap
15° Wet Steam, 15°, 25°, 40°, and Chemical
15° Wet Steam, 15°, 25°, 40°, and Chemical
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
SAE 30 Nondetergent
Universal Tractor Transmission
SAE 30 Nondetergent
SAE 30 Nondetergent
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
610.0000 lb
800.0000 lb
656.0000 lb
510.0000 lb
47.5 x 61.5 x 47.875 in
45.5 x 54.25 x 46.25 in
55.5 x 41.5 x 48.3125 in
43.5 x 37.5 x 48.31 in
-
-
-
15 in
See All Gas-Hot Water Pressure Washers
See All NorthStar Gas-Hot Water Pressure Washers
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