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North Star M157305B - User Manual

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K-BAR Industries, Faribault, MN, 55021
M157305B
Installation, Operation, and Maintenance Manual
HOT WATER PRESSURE WASHER: Cleans dirty surfaces with high-
pressure hot water.
To the Owner:
Thank you for purchasing a Northstar hot water pressure washer. Your machine is designed for long life,
dependability, and the top performance you demand! Take time now to read through this manual so you will
better understand the machine’s operation, maintenance and safety precautions. Everyone who operates this
machine must read and understand this manual. The time you take now will prolong your machine’s life and
prepare you for its safe operation. Enjoy the exceptional performance of your Northstar hot water pressure
washer, the industry leader! The manufacturer reserves the right to make improvements in design and/or
changes in specifications at any time without incurring any obligation to install them on units previously sold.
Quick Facts
Pump Oil Pump is shipped with oil. Change oil plug if and check pump oil level before starting.
Use UTTO for Comet and Cat Pump oil (item# 22158) for Cat oil changes.
Water Make sure your water flow is 20% higher than the pressure washer’s flow rate.
Make sure your water is clean and particle free.
Storage Do not allow water to freeze in the pump, hose, coil, or spray gun.
Spraying
Chemicals
Use any North Star brand or equivalent pressure washer chemicals.
Maintenance
Schedule
Pump Oil: change after first 50 hours, then every 3 months or 500 hours.
Read and understand all manuals before operating.
Any Questions, Comments, Problems or Parts Orders
In the United States
In the United Kingdom
Northstar Customer Service
Call 02392639752
Call 1-800-270-0810 Northern Tool and Equipment Co. (UK) Ltd.
Hours: Monday - Friday 7:00 AM to 5:30 PM Unit 2, Keel Close,
Saturday 7:30 AM-11:30 AM Central Time Portsmouth, Hants PO3 5QD, England
Proven Performance
ITEM NUMBER: 157305,306,307,308
SERIAL NUMBER:
HP:______ Volts:______ Amp:______ Ph:_____
RPM:____ PSI:____ GPM:____ Nozzle Size:_____
Pump:___________ Hose:______ Lance:_______
Max. Discharge Temperature:_____________

Questions and Answers

  • P
    Pamela SmithSep 9, 2025
    How to resolve poor detergent supply in North Star M157305B?
    • A
      Allison GeorgeSep 9, 2025
      If you're experiencing poor or no detergent supply with your North Star Pressure Washer, consider the following: 1. Adjust the soap control knob to a higher setting. 2. Refill the detergent container, ensuring the chemical strainer is fully submerged. 3. Use a shorter high-pressure hose and move the machine closer to your work. 4. Clean the chemical strainer, and always start with a clean detergent container. 5. Clean or replace the injector check valve, and run clean water through the injector after each use.
  • M
    Mr. Robert RichardsAug 23, 2025
    How to fix North Star M157305B Pressure Washer that will not run at all?
    • K
      Kaitlin PatelAug 23, 2025
      If your North Star Pressure Washer won't run and has no power, there are a couple of things to check. First, ensure that the pump switch is turned ON. Second, check the building's circuit breaker to see if it has tripped.
  • E
    emurrayAug 25, 2025
    What to do if North Star M157305B Pressure Washer runs but surges or cycles while in bypass?
    • A
      andrew17Aug 25, 2025
      If your North Star Pressure Washer runs but surges or cycles while in bypass, there are a couple of things to check: * Check all connections between the unloader and gun for leaks. Tighten any loose components and replace damaged ones. * Consider replacing the spray gun, as it may be leaking internally.
  • S
    staceytaylorAug 27, 2025
    How to fix low pressure on North Star Pressure Washer?
    • B
      Brittany NealAug 27, 2025
      If your North Star Pressure Washer has low pressure, it could be due to a couple of reasons: * Ensure the water supply provides more than 4 gpm. * Clean or replace the nozzle if it's partially clogged or damaged.
  • J
    John ValdezAug 27, 2025
    How to fix low pressure on a North Star Pressure Washer?
    • T
      Travis SmithAug 27, 2025
      If your North Star Pressure Washer has low pressure, ensure the water supply provides more than 4 gpm. Also, inspect the nozzle for clogs or damage; clean or replace it if necessary.
  • R
    Roger LoveAug 29, 2025
    How to troubleshoot a North Star M157305B Pressure Washer that will not run due to no power?
    • K
      Kyle CoxAug 29, 2025
      If your North Star Pressure Washer isn't running and has no power, there are several things to check: * First, ensure the machine is properly plugged in. * If it is, check the GFCI and make sure the machine is dry, then press the RESET button on the GFCI. * Verify that the pump switch is turned ON. * Finally, inspect the building's circuit breaker to see if it has tripped.
  • K
    Kevin RoachSep 18, 2025
    What causes a North Star Pressure Washer to surge or cycle in bypass?
    • T
      Teresa WrightSep 18, 2025
      If your North Star Pressure Washer runs but surges or cycles while in bypass, check all connections between the unloader and gun for leaks, tightening loose components and replacing damaged ones. Also, if the gun is leaking internally, replace the spray gun.
  • J
    John AdamsSep 18, 2025
    Why is there smoke coming from the heat exchanger on my North Star Pressure Washer?
    • J
      John PetersonSep 22, 2025
      If you notice smoke coming from the heat exchanger of your North Star Pressure Washer, adjust the air band until the burner burns cleanly. Also, use kerosene for the cleanest burn, as poor quality fuel may be the cause.
  • S
    Steven ButlerSep 7, 2025
    Why does the circuit breaker trip when I use my North Star M157305B Pressure Washer?
    • F
      Felicia NealSep 7, 2025
      If the circuit breaker trips when using your North Star Pressure Washer, there are several potential causes. Start by checking the voltage to ensure it is sufficient. Next, make sure that no other equipment is using the same circuit, as this could overload the breaker. Finally, check the pressure setting on the unloader and adjust if it is set too high.
  • C
    carrollkevinSep 4, 2025
    What causes a North Star M157305B to surge or cycle while in bypass?
    • K
      kristen37Sep 4, 2025
      If your North Star Pressure Washer surges or cycles while in bypass, it could be caused by: * A leak between the pump and gun. Inspect all connections and tighten any loose components, replacing damaged ones as needed. * The spray gun leaking internally. If this is the case, replace the spray gun.

North Star M157305B Specifications

General IconGeneral
BrandNorth Star
ModelM157305B
CategoryPressure Washer
LanguageEnglish

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