The pressure washer will have a four stroke engine. The recommended gasoline will be an octane rating of 87 (R+M)/2 or higher.
Stihl Dirt Boss Gas-Powered Cold Water Pressure Washer, 2700 PSI, 2.7 GPM, Kohler Engine, Model# RB 400

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- Powerful 6.5HP, 196cc engine can output up to 2700 PSI of water pressure at 2.7 GPM
- Easy Start Pump System features a pressure relief valve, allowing users to start the unit without any back pressure from the pump
- Quick, easy starting with no hard cord pulls
- Brass manifold pump design, stainless steel valves and ceramic- coated pistons for exceptional, long-lasting performance
- Comes standard with a detergent injector system, so you can easily add detergents to the washer for efficient cleaning
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Description
Key Specs
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Product Summary
This item may be purchased at select Northern Tool stores. Not available for online order at NorthernTool.com.
What's Included
- (1) Pressure washer (1) 25ft. flex hose
Features + Benefits
- Powerful 6.5HP, 196cc engine can output up to 2700 PSI of water pressure at 2.7 GPM
- Easy Start Pump System features a pressure relief valve, allowing users to start the unit without any back pressure from the pump
- Quick, easy starting with no hard cord pulls
- Brass manifold pump design, stainless steel valves and ceramic- coated pistons for exceptional, long-lasting performance
- Comes standard with a detergent injector system, so you can easily add detergents to the washer for efficient cleaning
- 4-point vibration isolation system reduces pump vibration during use for increased unit longevity
- 2-piece lance and gun assembly features reverse trigger pull for easy operation and extended length for better accuracy in tall applications
- Low oil shutdown is built in for engine protection
- On/off and fuel valve control allows the user to shut unit off and close fuel valve automatically for easy, no-mess transport
- 1 1/4in. dia. powder-coated steel tube frame with fold-down handle
- 25ft. no-kink flex hose allows you to reach more area without having to move the machine
- Easy-access inlet and outlet water connections
- Includes premium corrosion- and wear-resistant stainless steel nozzles for use with high-pressure water and a brass nozzle for use with detergent
Key Specs
| Attribute | Specification |
|---|---|
item# | 638631 |
Brand | Stihl |
Manufacturer's Warranty | 24 months parts/24months labor |
Ship Weight | 90.0 LB |
Pressure | 2,700 PSI |
Flow | 2.7 GPM |
Engine Brand | Kohler |
Engine Model | 400 |
Engine Displacement | 196 cc |
Fuel Type | Gasoline |
Pump | Brass manifold |
Drive Style | Direct |
CARB Compliant | No |
Number of Tips Included | 4 |
| Attribute | Specification |
|---|---|
Adjustable Pressure | Yes |
Start Type | Pull |
Engine Oil Included | Yes |
Engine Oil Type | 10w 30 |
Fuel Capacity | 1 Gal |
Chemical Injector | Yes |
Hose Length | 25 ft |
Nozzle Type | Brass |
Quick Connect Nozzle | Yes |
Pump Oil Included | Yes |
Low Oil Shutdown | Yes |
Thermal Protector | Yes |
Product Weight | 90 lb |
Reviews
Questions & Answers
Questions
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· 5 years ago
What gas does it take can’t find our manual
1 answer-
ProductExpert11· 5 years ago
Helpful?
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· 6 years ago
Is this suitable for paint stripping?
I see mixed information about power washer psi and gpm that is required for paint stripping, so I really do not know what the truth is in this matter.
1 answer-
ProductExpert11· 6 years ago
A pressure washer from 2,500 to 4,000 PSI is most effective for removing paint from a surface.
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Warranty
Manufacturer's Warranty
24 months parts/24months labor
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Specifications
2,700 PSI
4,000 PSI
4,200 PSI
2.7 GPM
3.5 GPM
4 GPM
Kohler
Honda
Kohler
400
GX390
800
196 cc
389 cc
429 cc
Gasoline
Gasoline
Gasoline
Brass manifold
CAT 5cp
Triple
Direct
Belt
Direct
No
-
-
4
4
4
Yes
Yes
No
Pull
Recoil
Manual
Yes
No
Yes
10w 30
SAE 30
10w-30
1 Gal
1.6 Gal
1.3 Gal
Yes
Yes
Yes
25 ft
50 ft
50 ft
Brass
Quick-connect
stainless steel nozzles
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
90 lb
210.0000 lb
168.0000 lb
-
19 ft-lbs.
-
-
140 °F
-
-
3.5
-
-
3/8 in
-
-
50.5 x 28.5 x 26.25 in
33.0 x 31.0 x 32.0 in









