NorthStar M157117I.1 User manual

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M157117I.1
Owner’s Manual
Instructions for Set-up, Operation, Maintenance & Storage
HOT WATER/STEAM PRESSURE WASHER –3500 PSI /3.5 GPM
Portable Outdoor-Use Only
This pressure washer produces both cold and hot water high-pressure spray as well as wet steam. Cleaning
chemicals may be incorporated into the spray if desired. The pressure pump for this equipment is powered
by a gasoline internal combustion engine and the water is heated by a diesel, kerosene/fuel-oil fired, down
draft burner.
WARNING –READ THIS MANUAL
READ and UNDERSTAND this Owner’s Manual and the Engine Owner’s Manual completely
before attempting to set up and use the pressure washer! Failure to properly set up, operate, and
maintain this pressure washer could result in serious injury or death to operator or bystanders.
WARNING –SPECIAL HAZARDS
CO Poisoning
•Exhaust from both the engine and burner contains carbon monoxide, a
poisonous gas that can cause carbon monoxide poisoning and possible death
if inhaled. ONLY run pressure washer OUTDOORS and at least 20 feet from
the home, away from windows, vents and air intakes, to allow proper
ventilation. If you start to feel sick, dizzy, or weak while using the pressure
washer, shut off the engine and get to fresh air RIGHT AWAY.
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/or severe tissue damage.
Burns
•Hot spray can scald and burn skin.
•Hot surfaces of wand, engine and burner, as well as hot exhaust from
both the engine and burner can cause burns.
Slips/FallsNOTE
•Spray discharge can cause puddles and slippery surfaces.
•Spray-gun kickback can cause operator loss of balance and falls.
Flying Debris
•High-pressure spray can cause surface damage and flying debris.
Fire/
Explosion
•Engine and burner sparking can ignite fuel or other flammable liquids
or vapors in the vicinity.
•Hot exhaust from engine and burner can ignite combustible materials.
Chemical Exposure
•Cleaning chemical vapors or contact with skin may be hazardous.
Electric shock
•Spray contact with electrical sources can cause electric shock.
A summary of important safety information is provided at the end of the manual.
Any Questions, Comments, Problems, or Parts Orders
Call NorthStar Product Support 1-800-270-0810
ITEM NUMBER: 157117
SERIAL NUMBER: _____________

Hazard Signal Word Definitions
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Equipment Protection Quick Facts
Inspect Upon
Delivery
STOP! Closely inspect to make sure no components are missing or damaged. See the
“Assembly and Initial Set-Up” section for instructions on whom to contact to report missing or
damaged parts.
Fill with
Engine Oil
STOP! Engine is shipped without oil. DO NOT start pressure washer without adding oil to
engine. Please refer to Engine Manual shipped with unit for acceptable grade motor oils. Refer
to the Prepare Engine instructions in Step 3. Initial Pump & Engine Preparation of the Assembly
and Initial Set-up section for additional oil quantity needed due to oil drain hose.
Check Pump
Oil
Pump is shipped with oil. Check pump oil level before starting. Remove shipping tape and
black vent plug (if present) from oil fill cap.
Battery
Required
A battery is not included. The engine will run but the burner will not fire unless a bat tery is
installed. Purchase a standard lawn and garden (Group U1) battery. The engine requires a 12V
battery, with a minimum rating of 18 Ah (Amp-hour).
Water Flow
Requirements
Make sure your supply water flow rate is 20% higher than the pressure washer’s flow rate
(see “Specifications” section for detail), and that your water is clean and particle free.
Storage
Do not allow water to freeze in the pump, hose, coil, or spray gun(s).
Chemical
Spraying
Use only NorthStar brand or equivalent washer chemicals designed for pressure washer
use.
Maintenance
Schedule
Engine:
•See Engine Owner’s manual.
Pump:
•Change oil after first 40 hours, then every 3 months or 500
hours.
Burner fuel filter
/water separator:
•Drain water as needed.
•Change filter after every 500 hours of use
Coil:
•Descale coil annually or more frequently as conditions /
performance require.
•Inspect coil for soot build-up annually and desoot if needed.
Electrodes:
•Inspect electrodes annually and clean/adjust as needed.

Table of Contents
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About Your Pressure Washer .....................................................................................................................4
Specifications.................................................................................................................................................5
Component Identification.............................................................................................................................6
Safety Labeling..............................................................................................................................................8
Special Equipment Safety Features.............................................................................................................9
Assembly and Initial Set-Up ........................................................................................................................10
Step 1. Unpacking & Delivery Inspection .................................................................................................10
Step 2. Assembly .......................................................................................................................................12
Step 3. Initial Pump & Engine Preparation................................................................................................13
Step 4. Battery Installation.........................................................................................................................13
Moving and Handling ..................................................................................................................................14
Before Each Use ............................................................................................................................................15
Step 1. Check Equipment...........................................................................................................................15
Step 2. Add Fuel(s) ....................................................................................................................................16
Step 3. Select a Suitable Worksite .............................................................................................................18
Operation.......................................................................................................................................................20
Step 1. Connect Hose(s), Water Supply, and Spray Nozzle(s)..................................................................20
Step 2. Set Up for Chemical Spray (if desired)..........................................................................................23
Step 3. Spraying.........................................................................................................................................24
Step 4. Stopping.........................................................................................................................................30
Storage............................................................................................................................................................31
Burner Adjustment ......................................................................................................................................35
Maintenance and Repair .............................................................................................................................36
Troubleshooting.............................................................................................................................................51
Major Components .......................................................................................................................................53
Parts Explosion: Frame –Rev I.1................................................................................................................54
Parts Explosion: Heat Exchanger –Rev I.1................................................................................................57
Parts Explosion: Blower & EMF –Rev I.1.................................................................................................59
Parts Explosion: Engine, Water & Fuel Pumps, Drive Parts –Rev I.1 ...................................................61
Parts Explosion: Accessories- Gun, Hose, Chemical Injector –Rev I.1...................................................64
Pump Explosion-66DX- Rev I.1...................................................................................................................65
Wiring Diagram –Rev I.1 ............................................................................................................................67
Summary of Important Safety Information ..............................................................................................69
Limited Warranty ........................................................................................................................................75
California Proposition 65 Information .......................................................................................................78

About Your Pressure Washer
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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 wet steam spray or water spray (heated or unheated) -- up to 3.5 gallons per
minute at 3500 psi.
2) Incorporate cleaning chemicals into a low-pressure water spray.
Wet steam is a combination of liquid water droplets and water vapor. Wet steam delivers more heat, and a
balanced amount of flow and Impact which increase cleaning effectiveness and reduces spray back.
The pump requires a clean, standard tap water supply provided through a garden hose at a flow rate of at least
4.2 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 diesel,
kerosene/fuel-oil fired, spark-ignited, down draft 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 (diesel, kerosene, 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 “Before Each Use” 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
•Skin/eye injury from
high pressure spray
•Burns
•Slips/falls
•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. Always
keep this owner’s manual with the pressure washer 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.

Specifications
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MODEL
Model #
157117
FLOW OUTPUT
Pressure Rating
3500 psi
Flow Rate
3.5 gpm
Maximum Temperature
250F
DIMENSIONS / COMPONENTS
Length
59"
Width
35.625"
Height
43"
Weight (fueled)
548 lbs.
Pump Type
66DX
Engine Model
Honda GX390
Engine Type
Air-cooled 4-stroke
Drive
Direct
Burner
12 VDC
Engine Displacement
389cc
High Pressure Discharge Hose
3/8” x 50’
Chemical Injection Ratio
13 to 1
SUPPLIES REQUIRED (not included)
Engine Fuel
Regular, Unleaded Gasoline
(Capacity: 8 Gal.)
Engine Oil
See Engine Owner’s Manual and Step 3 of
the Assembly and Initial Set-up section for
additional oil quantity needed due to oil
drain hose.
Burner Fuel
#1 or #2 Diesel, B5 or lower Biodiesel,
Kerosene, or Fuel Oil
(Capacity: 8 Gal.)
Pump Oil
(shipped with oil, but refills required)
SAE 30 non-detergent oil
Input Water Supply
Standard tap water @ 20-75 psi, delivered
@ 4.2 gpm or higher
Input Water Supply Hose
Standard garden hose with inside diameter
at least 5/8” (at least 3/4” diameter if hose
longer than 100 ft.)
Battery
12 Volt, minimum 18 Amp/Hr.
Lawn and Garden Battery (Group U1)