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About Your Pressure Washer 

 

4

Thank you for purchasing a NorthStar hot water pressure washer!  Your machine is designed for long life, 
dependability, and the top performance you demand.  This pressure washer is designed to: 

 

1)  Produce a high-pressure steam spray or water spray (heated or unheated) -- up to 2.5 gallons per minute 

at 2750 psi. 

2)  Incorporate cleaning chemicals into a low-pressure water spray. 

 

The pump requires a clean, standard tap water supply provided through a garden hose at a flow rate of at least 3 
gallons per minute.  The use of a backflow preventer on the water supply hose is recommended and may be 
required by local code.  Any cleaning chemicals that are used must be specifically approved for use in pressure 
washers. 

 

The pump is powered by a gasoline-fueled engine.  The spray water is heated (when desired) by a kerosene/fuel-
oil fired, spark-ignited, open flame burner.  Normal operation of this equipment will require you to supply: 

 

• 

Gasoline fuel and lubrication oil for the engine 

• 

Pump oil 

• 

Fuel for the burner (kerosene, diesel, or fuel oil)

 

• 

A 12-volt standard lawn and garden battery  

 

See the “

Specifications

” section of this manual for more detail. 

 

Gasoline powered pressure washers are for OUTDOOR USE ONLY.   

Be sure to read about site selection 

for running this pressure washer in the “

Installation & Initial Set-up

” section of this manual.   

 

The user should plan to acquire and wear safety apparel during operation of this pressure washer.  Safety apparel 
includes waterproof insulated gloves, safety glasses with side and top protection, and non-slip protective 
footwear.  Some cleaning chemicals may require the use of a respirator mask (as instructed on chemical label). 

 

Before using this washer, the user shall determine the suitability of this product for its intended use 
and assumes liability therein. 

Read this Manual 

 

    

WARNING 

 

Carefully read and follow all instructions and safety information

 for using this pressure 

washer.  Improper use or maintenance of the pressure washer can result in 

serious injury or death 

to the operator or bystanders from:  

 

• 

Carbon monoxide poisoning

• 

Fire/explosion 

• 

Chemical exposure 

• 

Burns 

• 

Slips/falls 

• 

Skin/eye injury from high 
pressure spray 

• 

Electric shock 

• 

Flying objects/debris

 

 

 

Keep this manual for reference and review. A summary of important safety information can be found 
at the end of the manual.   

 

Proper preparation, operation, and maintenance of this pressure washer will result in optimal 
performance and a long life for this equipment. For detailed Engine operation and maintenance 
information, always refer to the Engine Owner’s Manual furnished with the pressure washer.

 

 

ATTENTION: 

Rental Companies and Private Owners who loan this equipment to others! 

All persons to whom you rent/loan this pressure washer must have access to and read this manual.  Keep this 
owner’s manual with the pressure washer at all times and advise all persons who will operate the machine to 
read it.  You must also provide personal instruction on how to safely set-up and operate the pressure washer 
and remain available to answer any questions a renter/borrower might have. 

Summary of Contents for M157309M.1

Page 1: ...ssible death if inhaled Skin Eye Injury High pressure spray can cause serious skin or eye injury including injection injury if fluid pierces the skin Injection injury can result in blood poisoning and...

Page 2: ...ill result Purchase a standard 12VDC 18 Ah lawn and garden battery Group U1 7 Water Flow Requirements Make sure your supply water flow rate is 20 higher than the pressure washer s flow rate see Specif...

Page 3: ...4 Battery Installation 14 Moving and Handling 16 Before Each Use 17 Step 1 Check Equipment 17 Step 2 Add Fuel s 18 Step 3 Select a Suitable Worksite 20 Operation 22 Step 1 Connect Hose s Water Supply...

Page 4: ...Safety apparel includes waterproof insulated gloves safety glasses with side and top protection and non slip protective footwear Some cleaning chemicals may require the use of a respirator mask as ins...

Page 5: ...included Engine Fuel Regular Unleaded Gasoline Engine Oil See Engine Owner s Manual Burner Fuel 1 or 2 Diesel B5 or lower Biodiesel Kerosene or Fuel Oil Capacity 4 Gal Pump Oil shipped with oil but r...

Page 6: ...Exhaust Vent 11 Control Panel 20 Circuit Breaker 3 Heating Coil 12 High Pressure Outlet 21 Heat Switch 4 Garden Hose Water Inlet 13 Fuel Filter 22 Thermostat 5 Pump 14 Burner 23 Indicator Lights LED 6...

Page 7: ...Panel Opening to access battery and additional enclosed components 12 High Pressure Outlet A passage for water to exit pump and enter the hose 13 Fuel Filter Water Separator Filter in fuel line that...

Page 8: ...ry and loss of balance Hot discharge fluid and hot surfaces can burn NEVER direct discharge stream at or near any person Do not allow any part of the body to come in contact with the fluid stream Gun...

Page 9: ...ly turns the burner off when the temperature setting is reached When the water temperature drops the burner automatically reignites Thermal Relief Valve This unit is equipped with a thermal relief val...

Page 10: ...ion Each of these steps is discussed below Step 1 Unpacking Delivery Inspection Find and separate the components identified in Figure 2 Overview of Pressure Washer Components and Figure 3 Hardware Bag...

Page 11: ...rt 38509 5 16 18 x 2 Flange Bolt Qty 4 Part 82018 Wheel Retainers Qty 4 Part 305200 Grommets Qty 6 Part 35198 Hose Hook Qty 1 Part 38510 Nozzles Qty 6 Part 38531 778198 5 16 Flat Washer Qty 4 Part 820...

Page 12: ...Flange Nuts FIG02320 Install Grommets and Nozzles into Holes in Control Panel Install One 1 Gun Hooks into Left Side of Handle using Two 2 5 16 18 Flange Nuts Install Hose Hook into Right Side of Han...

Page 13: ...e a third person slides the wheels onto the Rear Axle Fasten each wheel with a wheel retainer using a hex wrench b Front Wheels Have two people lift the front of the pressure washer by the handle whil...

Page 14: ...The inside dimensions of the battery compartment are 11 1 8 L x 7 3 4 W x 10 1 8 H The battery compartment is shown in Figure 6 below To install the battery first remove the end cap to gain access to...

Page 15: ...sequence to avoid possible shock 1 Find the battery cables located inside the battery compartment 2 Connect the red cable to the positive terminal of the battery 3 Then connect the black cable to the...

Page 16: ...pressure washer around 1 Use the handle to manually move the pressure washer 2 To turn lift slightly on the handle and pivot the pressure washer on its front wheels 3 Block wheels to prevent inadverte...

Page 17: ...ctions WARNING Burn hazard Never open oil port while engine is running Hot oil can spray over face and body Notes o Low oil shutdown feature prevents the engine from starting without sufficient oil o...

Page 18: ...ntenance has been performed as prescribed in this manual in the Maintenance Repair section 1 Refer to the engine owner s manual for engine maintenance instructions 2 Make sure battery is charged Charg...

Page 19: ...sure washer away from spilled fuel on the ground Wipe up spilled fuel and wait 5 minutes for excess fuel to evaporate before starting engine Fuel soaked rags are flammable and should be disposed of pr...

Page 20: ...ntrations within minutes Follow the directions below for choosing a location to operate your pressure washer in order to avoid carbon monoxide poisoning The location you choose to operate the pressure...

Page 21: ...clearance The exhaust gas from your pressure washer is extremely hot and can cause combustible materials to catch on fire Make sure both the engine exhaust and burner exhaust are at least 7 feet from...

Page 22: ...for use Place pressure washer in a suitable location for use as directed in the Before Each Use Step 3 Select Suitable Worksite section of this manual A suitable location is OUTDOORS only away from a...

Page 23: ...long it takes to fill a 5 gallon bucket with your garden hose It should take less than 100 seconds Attach garden hose to pump Attach garden hose to the water inlet on the pump 1 See Machine Component...

Page 24: ...g table Color of Nozzle Spray Angle Used For Red 0 Highest Impact Yellow 15 Tough Stains Stripping Green 25 General White 40 Light Cleaning Black Low pressure 65 Chemicals Yellow 15 Steam NOTE You mus...

Page 25: ...cted to the spray gun Do not attempt to use different types of nozzles that may not fit the coupler Step 2 Set Up for Chemical Spray if desired Using the proper cleaning chemical for the application c...

Page 26: ...the chemical Understand all safety hazards and first aid for all chemicals being used Always wear protective gloves when handling and cleaning with chemicals and wear other protective gear as directe...

Page 27: ...bove the pressure rating of the machine Modifications Do not modify the pressure washer in any way or deactivate any safety device Do not change or add to fuel tank fuel lines or exhaust system Modifi...

Page 28: ...s from hot water or steam Eye injury from flying debris 1 Wear waterproof thermally insulated gloves safety glasses with side and top protection face protection and protective clothing when operating...

Page 29: ...cal label If warm water is specified start burner according to instructions provided below 4 Apply chemicals by squeezing the spray gun trigger The chemical injector will draw the chemical into the wa...

Page 30: ...so when the temperature setting is reached the thermostat automatically turns the burner off WARNING It is important that the burner stops firing when the trigger is released If the burner remains fir...

Page 31: ...ixtures flowerbeds mailboxes o unsecured lightweight objects Procedure 1 Put on one of the high pressure spray nozzles always relieve system pressure first and follow instructions for attaching a nozz...

Page 32: ...he adjustment knob will void your warranty 9 If temporarily interrupting spraying rotate trigger safety latch downward to the locked position to guard against accidental trigger release 10 Always turn...

Page 33: ...engine is turned OFF 1 If the heater was used turn heat switch OFF and run cold water through the coil for at least 3 minutes while spraying 2 Turn engine OFF 3 Turn water supply OFF 4 Actuate spray...

Page 34: ...ources of heat open flames sparks or pilot lights even if the pressure washer s engine and burner fuel tanks are empty Residual fuel fumes from tank can ignite o Away from extreme high or low temperat...

Page 35: ...tlet Prepare engine for long term storage if storing more than 30 days First prepare the engine for long term storage if you will not be using the pressure washer again for more than 30 days Fuel can...

Page 36: ...times to lubricate the combustion chamber d Replace spark plug but do not reconnect the spark plug wire Prepare pressure washer for storage Prepare the pressure washer for storage 1 Disconnect the ba...

Page 37: ...handle to tip the pressure washer forward so the front edge of the burner fuel tank is resting on the ground Prop rear axle up in this position with two 16 jack stands WARNING The burner adjustment p...

Page 38: ...ate the shutter as shown in Figure 14 below The shutter is a thin circular metal plate located on the outside of the air band The shutter adjusts independently from the air band and is used to fine tu...

Page 39: ...ed Change filter after every 500 hours of use Descale coil Annually or more frequently as use and performance require see instructions Inspect and desoot coil if needed Annually Inspect clean adjust e...

Page 40: ...properly hooked up or there is a fuel leak when you start the engine Inspect the entire fuel system for both engine and burner Look for signs of leaks or deterioration chafed or spongy fuel hose loos...

Page 41: ...re pressure before each use 1 Remove air cap on tire 2 Check tire pressure 3 If needed fill tire to 30 psi Do not over inflate 4 Replace air cap Recharge and maintain battery Inspect recharge and main...

Page 42: ...s of use and then after every 3 months or 500 hours of use after that 1 Remove drain plug from pump 2 Drain pump oil into suitable container and dispose of responsibly 3 Reinstall oil drain plug 4 Mak...

Page 43: ...spray and may eventually clog water flow through the heating coil Descale the coil tubing at least annually and more frequently if you detect a decrease in output pressure or temperature To descale th...

Page 44: ...le movement is important because the burner will not fire if the shuttle does not move The shuttle movement actuates a switch inside the flow switch housing which allows the burner to fire during spra...

Page 45: ...ale tabs on the shuttle to the female guides inside the brass flow switch body can be difficult since the shuttle is magnetic 7 Thread the removable outlet fitting with the swivel still attached into...

Page 46: ...es the soot build up If soot has built up on the exterior of the coil tubing clean as follows 1 Wear protective clothing goggles and gloves 2 Disconnect high pressure hose on inlet side of coil and th...

Page 47: ...ve the 4 nuts that attach the burner to the heating chamber You do not have to disconnect the fuel lines or the electric cords 2 Pull the burner out from underneath the heat exchanger 3 Clean off carb...

Page 48: ...Maintenance Repair 48 4 Reset the spacing as shown below in Figure 24 1 16 1 8 5 16 Electrodes Figure 24...

Page 49: ...e strongly recommend the following Have a staff person become familiar with the mechanical operation of the pressure washer and capable of making minor repairs and performing all preventative maintena...

Page 50: ...ile In Bypass Causes Solutions Leak between unloader and gun Check all connections between unloader and gun for leaks Tighten loose components and replace damaged components Gun leaking internally Rep...

Page 51: ...Parts Explosion Rev M 1 51...

Page 52: ...4 Handle 1 18 783423 Lower ISO Mount Plate 1 52 38510 Threaded Hose Hook 1 19 38509 Threaded Gun Hook 2 53 782121 Pop Off Valve 3 8 1 20 12278 Steel Tire Wheel Assembly 4 54 777347 Tee 6MP 6FP 6FP 1 2...

Page 53: ...63 RW1 Red Lead Wire Circuit Breaker to Relay 777664 BW1 Black Battery Cable 777108 WN Wire Nut 5265 LED Red LED with wire leads 777646 FLO SW Flow Switch Includes Black White Red Wires 784621 THERM A...

Page 54: ...Control Panel Wiring Diagram Rev M 1 54 Red LED Thermostat 12V Relay Switch Circuit Breaker...

Page 55: ...Burner Wiring Diagram Rev M 1 55...

Page 56: ...le fatigued or under the influence of alcohol drugs or medication Understand intended use Carefully read about and understand the intended use of this pressure washer Do not use for other purposes as...

Page 57: ...ast 7 away from combustible objects during operation Spark arrestor usage Equip engine with a spark arrestor if pressure washer will be used near any ignitable forest brush or grassy land See the Spec...

Page 58: ...Operators should wear waterproof thermally insulated gloves safety glasses with side and top protection face protection and protective clothing when operating the machine If spraying pressure washer...

Page 59: ...lve above the rated pressure If the high pressure relief valve ever discharges water turn the engine off and do not use the machine Call Product Support at 1 800 270 0810 Never pull by hose Do not mov...

Page 60: ...ance Perform periodic maintenance as directed in this manual to keep the pressure washer in safe working condition Safety Inspection Maintenance Inspect and maintain your pressure washer on a regular...

Page 61: ...h as engines are guaranteed by their manufacturer and can be serviced at factory authorized locations near you Any costs incurred due to replacement or repair of items outside of a NorthStar approved...

Page 62: ...62 Manufactured by Northern Tool Equipment Co 2800 SouthCross Drive West P O Box 1499 Burnsville MN 55337 0499...

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