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North Star M157597AG - User Manual

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M157597AG
Owner's Manual
Instructions for Set-up, Operation, Maintenance & Storage
TRAILER MOUNTED, 2-GUN HOT WATER PRESSURE WASHER
– 4000 PSI / 7 GPM
Portable Outdoor-Use Only
This pressure washer produces both cold and hot water high pressure spray. 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 kerosene/fuel-oil fired, open flame 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.
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/Falls
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.
Trailer tipover
Sudden stopping or turning while towing the pressure washer with a
filled water tank can result in driving instability and/or trailer tipover.
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: 157597
SERIAL NUMBER: _____________

Table of Contents

Questions and Answers

  • C
    Christopher JohnsonJul 31, 2025
    How to fix a North Star Pressure Washer when the engine will not start?
    • B
      brookslawrenceAug 1, 2025
      If your North Star Pressure Washer's engine won't start, there are several possible causes: * **Low Oil:** Ensure the engine has the adequate amount of oil. * **Cold Engine:** Use the choke to help start the engine. * **No Fuel:** Add gas to the engine and check that the fuel shutoff valve is open. * **Dead Battery:** Recharge or replace the battery. * **Spark Plug Wire:** Make sure the spark plug wire is securely attached to the spark plug.
  • V
    Vanessa SullivanAug 5, 2025
    What to do if North Star Pressure Washer runs but has no pressure?
    • D
      davidcannonAug 6, 2025
      If your North Star Pressure Washer runs but isn't producing any pressure, consider the following: * **Nozzle Issues:** Check for a partially clogged or damaged nozzle. Clean or replace it as needed. * **Water Filter:** A clogged water filter can restrict water flow. Clean the water filter. * **Nozzle Combinations:** Ensure you are using the correct nozzle configurations as specified in the manual. * **Low Water Flow:** Inspect the suction line for any kinks that might be restricting water flow.
  • N
    Nicole KelleyAug 10, 2025
    Why North Star Pressure Washer runs but burner doesn't fire?
    • H
      hthompsonAug 10, 2025
      If your North Star Pressure Washer runs, but the burner doesn't ignite, here's what you can check: * **Heat Switch:** Make sure the heat switch is turned ON. * **Thermostat Setting:** Verify the thermostat is set to the desired temperature and not too low or off. * **Fuel Level:** Ensure the fuel tank is filled with kerosene, diesel, or fuel oil. * **Flow Switch:** The flow switch might be defective. Clean the flow switch, referring to the Maintenance and Repair section for instructions. * **Defective Thermostat/Burner:** For a defective thermostat or burner, it is recommended to call Product Support.
  • A
    Aaron HermanAug 15, 2025
    How to troubleshoot poor detergent supply in North Star M157597AG Pressure Washer?
    • L
      leslievangAug 15, 2025
      If your North Star Pressure Washer isn't supplying detergent properly, consider these points: * **Soap Control Knob:** Adjust the soap control knob to a higher setting. * **Detergent Supply:** Refill the detergent container, ensuring the chemical strainer is fully submerged. * **Hose Length:** If the high-pressure hose is too long, use a shorter hose or move the machine closer to your work area. * **Clogged Components:** Clean the chemical strainer and injector. Always start with a clean detergent container and run clean water through the injector after each use.
  • W
    williehallAug 20, 2025
    Why is my North Star M157597AG Pressure Washer producing smoke from the heat exchanger?
    • M
      meyerdavidAug 20, 2025
      If you notice smoke coming from the heat exchanger of your North Star Pressure Washer: * **Air Band Adjustment:** The air band may not be adjusted properly. Adjust the air band until the burner burns cleanly, referring to the Installation Instructions. * **Fuel Quality:** Poor quality fuel can cause smoking. Use kerosene for the cleanest burn.
  • P
    pmannAug 26, 2025
    What causes water not heating sufficiently in North Star M157597AG?
    • S
      Shaun SpearsAug 26, 2025
      If the water from your North Star Pressure Washer isn't heating sufficiently: * **Scale Build-up:** There might be scale build-up in the coil. See Coil Descaling under Maintenance Instructions. * **Soot in Coil:** If the coil is full of soot, it is recommended to call Product Support.

Summary

WARNING - READ THIS MANUAL

WARNING - SPECIAL HAZARDS

Lists various hazards associated with pressure washer operation, including CO poisoning, burns, and electric shock.

Hazard Signal Word Definitions

Equipment Protection Quick Facts

About Your Pressure Washer

Specifications

Component Identification

Special Equipment Safety Features

On-Product Warning Labels

Lists and describes the various safety labels found on the pressure washer itself.

High Pressure Safety Device (Rupture Disc)

Explains the function of the rupture disc as a backup safety feature for over-pressure protection.

High Temperature Limit

Describes the high temperature limit that monitors and controls discharge spray temperature.

Spray Gun Safety Latch

Details the safety latch on the spray gun trigger to prevent accidental actuation.

Assembly and Initial Set-Up

Step 1. Unpacking & Delivery Inspection

Instructions for unpacking components and inspecting for damage or missing parts.

Step 3. Initial Pump, Engine & High Pressure Hose Preparation

Details preparing the pump, engine oil, and high-pressure hose before initial use.

Step 4. Battery Installation

Provides instructions for installing the 12-volt battery, including safety precautions.

Moving and Towing

Connecting Trailer and Towing

Step-by-step guide for connecting the trailer to a towing vehicle, including safety checks.

Route breakaway switch cable

Explains how to properly route the breakaway switch cable for trailer brake activation.

Rough or sloped terrain

Safety advice for towing over uneven or inclined surfaces to prevent rollovers.

Before Each Use

Step 1. Check Equipment

Instructions for checking pump oil, engine oil, and spray system for leaks or damage.

Inspect fuel system

Guidance on inspecting fuel systems of both engine and burner for leaks and damage.

1. Outdoors ONLY

Emphasizes operating the pressure washer exclusively outdoors to prevent CO poisoning.

Operation

Step 1. Connect Hoses, Water Supply, and Spray Nozzle

Details connecting hoses, water supply, and selecting the appropriate spray nozzle.

Select spray nozzle

Guidance on choosing the correct nozzle based on the cleaning job and whether using one or two guns.

Step 2. Set Up for Chemical Spray (if desired)

Instructions for setting up the chemical injector for spraying cleaning solutions.

Safety rules for operation

General safety rules to follow during operation, covering conditions for use and during use.

Put on personal protective gear

Mandates wearing appropriate personal protective equipment for safe operation.

Apply cleaning chemical (if desired)

Steps for applying cleaning chemicals at low pressure using the injector system.

Begin high pressure spray

Procedure for starting and using the high-pressure spray function of the washer.

Prevent slips; loss of balance

Advises on maintaining balance and footing to avoid slips and falls during operation.

Step 4. Stopping

Detailed steps for safely shutting down and stopping the pressure washer.

Storage

Choose a storage location

Criteria for selecting a proper storage location, emphasizing cleanliness and safety.

Prepare engine for long term storage (if storing more than 30 days)

Steps to prepare the engine for storage, including fuel system and lubrication.

Burner Adjustment

Burner Correction

Detailed steps for adjusting air bands and shutter for burner correction.

Maintenance & Repair

Maintenance Schedule

Lists recommended maintenance tasks and their frequency for optimal performance and safety.

Keep pressure washer clean

Instructions for cleaning the pressure washer, including cautions about water use.

Clean inlet filter

Procedure for cleaning the inlet filter before each use to ensure proper water flow.

Change pump oil

Details the procedure and schedule for changing the pump oil for proper lubrication.

Descale heating coil

Instructions for descaling the heating coil tubing to maintain performance and prevent clogging.

Inspect electrodes

Guidance on inspecting and adjusting electrodes annually for proper burner function.

Drive belt maintenance

Describes how to check and maintain drive belt tension for optimal power transfer.

Brake maintenance

Instructions for inspecting and maintaining the trailer brakes for safe towing.

Troubleshooting

Engine Will Not Start

Lists causes and solutions for the engine failing to start, such as low oil or dead battery.

Pressure Washer Runs But Burner Doesnt Fire

Troubleshooting steps for when the burner fails to ignite or operate correctly.

Pressure Washer Runs But No Pressure

Solutions for issues causing low or no pressure, like clogged nozzles or low water flow.

Parts Explosion - M157597 Rev AG (Skid)

Parts Explosion - M157597 Rev AG (Trailer)

Pump Explosion

Wiring Diagram

Summary of Important Safety Information

General

General safety guidelines covering reading instructions, operator training, and intended use.

Prohibition Against Modifications

Warns against altering the pressure washer, including fuel systems, unloader valves, and guards.

Safety - Installation & Set-up

Covers safety precautions related to battery installation and initial setup procedures.

Safety - Operation

Details safety rules for pre-start and during operation, emphasizing hazards like injection injury and CO poisoning.

Safety - Inspection;Maintenance

Outlines safety procedures for inspection, maintenance, and repair, including part replacement.

Limited Warranty

North Star M157597AG Specifications

General IconGeneral
BrandNorth Star
ModelM157597AG
CategoryPressure Washer
LanguageEnglish

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