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North Star M157304G - User Manual

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1
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M157304G
Installation, Operation, and Maintenance Manual
Cold Water Pressure Washer: Cleans dirty surfaces with high-pressure water.
To the Owner:
Thank you for purchasing a NorthStar 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 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 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 and check pump oil level before starting.
Use SAE 30 Non-detergent pump oil (item# 4043) or Cat Pump oil (item# 22158) for 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. Maximum inlet water temp. 140°F (60°C)
Storage Do not allow water to freeze in the pump, hose, or spray gun.
Spraying
Chemicals
Use any North Star brand or equivalent pressure washer chemicals.
Adjust soap adjustment knob to regulate cleaning power.
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
Call NorthStar Product Support 1-800-270-0810
ITEM NUMBER: 157304
SERIAL NUMBER:
HP:______ Volts:______ Amp:______ Ph:_____
RPM:____ PSI:____ GPM:____ Nozzle Size:_____
Pump:___________ Hose:______ Lance:_______
Max. Discharge Temperature:_____________

Questions and Answers

  • M
    mossjohnAug 10, 2025
    What to do if North Star M157304G Pressure Washer runs but doesn't spray water?
    • M
      Mrs. Veronica BaileyAug 11, 2025
      If your North Star Pressure Washer runs but doesn't spray water, make sure you are squeezing the trigger. Also, the nozzle might be clogged, so try cleaning the nozzle orifice.
  • S
    Steven MartinAug 15, 2025
    Why does my North Star M157304G Pressure Washer keep tripping the circuit breaker?
    • G
      Glenda KellyAug 15, 2025
      Your North Star Pressure Washer might be tripping the circuit breaker because the voltage is too low, the circuit breaker is overloaded, or the pressure is set too high. Check the voltage, ensure no other equipment is using the same circuit, and check/adjust the pressure setting on the unloader.
  • J
    johnsonrachelAug 20, 2025
    What to do if my North Star M157304G Pressure Washer will not turn on?
    • W
      Wayne AdamsAug 20, 2025
      If your North Star Pressure Washer won't turn on, first ensure the pump switch is ON. Also, check for a tripped circuit breaker in the building.
  • G
    garciachristopherAug 26, 2025
    How to fix poor detergent supply on North Star M157304G?
    • M
      Misty FloresAug 26, 2025
      If your North Star Pressure Washer has poor or no detergent supply, try the following: * Adjust the soap control knob. * Refill the detergent container, ensuring the chemical strainer is fully submerged. * Use less high-pressure hose or move the machine closer to the work. * Clean the chemical strainer, starting with a clean detergent container. * Clean the injector check valve or replace the injector. Run clean water through the injector after each use.
  • C
    Christopher BryanAug 30, 2025
    Why is the pressure low on my North Star M157304G Pressure Washer?
    • H
      hlunaAug 30, 2025
      Low pressure on your North Star Pressure Washer could be due to low water flow or a partially clogged/damaged nozzle. Ensure the water supply is more than 4 gpm. Clean or replace the nozzle.
  • J
    Jodi CochranSep 4, 2025
    Why does my North Star M157304G surge while in bypass?
    • R
      Russell JohnsonSep 4, 2025
      If your North Star Pressure Washer surges or cycles while in bypass, there might be a leak between the unloader and gun or the gun is leaking internally. Check all connections between the unloader and gun for leaks, tighten loose components, and replace damaged components. If the gun is leaking internally, replace the spray gun.

North Star M157304G Specifications

General IconGeneral
BrandNorth Star
ModelM157304G
CategoryPressure Washer
LanguageEnglish

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