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NorthStar 157305 - User Manual

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M157305L.1
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 and check pump oil level before starting.
Use Universal Tractor Transmission Oil (UTTO) or Mobil1 Synthetic15w50 for Comet
pumps 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 NorthStar 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
NorthStar Product Support 1-800-270-0810
ITEM NUMBER: 157305,306,307,308
SERIAL NUMBER:
HP:______ Volts:______ Amp:______ Ph:_____
RPM:____ PSI:____ GPM:____ Nozzle Size:_____
Pump:___________ Hose:______ Lance:_______
Max. Discharge Temperature:_____________
®

Table of Contents

Questions and Answers

  • L
    Linda AdamsAug 10, 2025
    What to do if NorthStar 157305 Pressure Washer runs but has no pressure?
    • L
      Lindsey RoblesAug 10, 2025
      If your NorthStar Pressure Washer runs but isn't producing pressure, the issue might be a partially clogged or damaged nozzle. Try cleaning or replacing the nozzle. Another potential cause is low water flow; ensure that your water supply exceeds the required flow.
  • B
    Brittany GarciaAug 15, 2025
    What to do if NorthStar 157305 Pressure Washer will not run and has no power?
    • J
      Joseph RodriguezAug 15, 2025
      If your NorthStar Pressure Washer isn't running and has no power, first, ensure the machine is properly plugged in. Then, check the GFCI and make sure the machine is dry before pressing the RESET button. Also, verify that the pump switch is turned ON and inspect the building's circuit breaker for any tripped breakers.
  • B
    Benjamin ColeAug 19, 2025
    Why does my NorthStar 157305 circuit breaker trip during operation?
    • M
      martinbrianAug 19, 2025
      Your NorthStar Pressure Washer's circuit breaker might be tripping due to several reasons. First, check if the voltage is too low. Second, the circuit breaker might be overloaded, so ensure you are using a NEMA specified receptacle and that no other equipment is using the same circuit. Finally, the pressure might be set too high; check and adjust the pressure setting on the unloader.
  • J
    johnsonheatherAug 25, 2025
    Why is there poor or no detergent supply from my NorthStar 157305 Pressure Washer?
    • L
      Linda SchultzAug 25, 2025
      If your NorthStar Pressure Washer has poor or no detergent supply, there are a few things to check: 1. Refill the detergent container and ensure the chemical strainer is fully submerged. 2. If the high-pressure hose is too long, use a shorter hose or move the machine closer to your work. 3. Inspect the chemical strainer and injector for clogs; clean them, always start with a clean detergent container, and run clean water through the injector after each use.
  • S
    shepardmelindaAug 30, 2025
    What to do if NorthStar 157305 surges or cycles while in bypass?
    • B
      brady68Aug 30, 2025
      If your NorthStar Pressure Washer surges or cycles while in bypass, check all connections between the pump and gun for leaks. Tighten any loose components and replace damaged components. Additionally, the spray gun might be leaking internally, in which case you should replace it.
  • J
    James Taylor MDSep 3, 2025
    Why is there smoke from the heat exchanger of my NorthStar Pressure Washer?
    • D
      dhendersonSep 4, 2025
      Smoke from the heat exchanger of your NorthStar Pressure Washer can be due to an air band that is not adjusted properly for your elevation. Adjust the air band until the burner burns cleanly. It can also be caused by poor quality fuel. Use Kerosene for the cleanest burn.

NorthStar 157305 Specifications

General IconGeneral
BrandNorthStar
Model157305
CategoryPressure Washer
LanguageEnglish

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