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  4. M157551A
  5. Owner's Manual

North Star M157551A Owner's Manual

Summary of M157551A

  • Page 1

    M157551a item# 157551 pressure washer owner’s manual p r ov e n p e r f o r m a n ce read and understand this manual before operating this machine. Engine is shipped without oil. Use sae 30 motor oil. Pump is shipped with oil. Remove the shipping plug from the pump and replace it with the vented dip...

  • Page 2: Important

    2 to the owner: thank you for purchasing a north star 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 w...

  • Page 3: Table Of Contents

    3 table of contents safety instructions 4-5 specifications 6 machine component identification 6-8 assembling the machine 9 before using the machine the first time 10 setting up the machine 11 start-up instructions 12-15 shut-down instructions 16 operating the machine 17-19 routine maintenance 20-21 ...

  • Page 4: Safety Instructions

    4 safety instructions read and understand these instructions because they deal with safety. Pay particular attention to this safety s ymbol throughout this manual. Failure to comply with these instructions may result in property damage, personal injury, or death. Important united states government s...

  • Page 5: Safety Instructions

    5 safety instructions never use the machine when under the influence of alcohol or any other drug. Never smoke while operating or fueling this machine. Only add fuel to the machine when the power is off. Never attempt to clean the machine with its own spray. Cleaning should be done with a damp spong...

  • Page 6: Specifications

    6 specifications item number #157551 pressure rating (psi) 2500 flow output (gpm) 3 pump type triplex ceramic plunger water supply standard tap water @ 20-100psi engine horsepower 5 fuel capacity (quarts) 3 discharge hose 3/8” x 30’ dimensions length 28” width 19.5” height 24” approximate weight 88 ...

  • Page 7

    7 machine component identification 1. Engine on-off sw itch 2. Choke 3. Fuel shut-off 4. Throttle 5. Fuel tank fill 6. Recoil 7. Oil fill 8. Oil drain 9. Air filter 10. Muffler (caution hot!) 8 7 7 1 4 3 5 2 8 7 9 10 6 00079 00080 engine features benefits • overhead valves (ohv) • more fuel efficien...

  • Page 8

    8 machine component identification 4 5 1 3 2 6 pump features benefits •triplex ceramic plungers •long life, no corrosion •triplex design •less vib ration •industrial crankshaft •dependable, proven design •thermal protector •protects pump from hot water •safety relief valve •prevents pump from overpr...

  • Page 9: Assembling The Machine

    9 assembling the machine step 1 your pressure w asher is shipped in tw o boxes. Separate and identify the components found in both boxes. Use the assembly instructions found in the cart box to assemble the cart. The components show n below w ill be in the same box as the engine/pump. Step 2 you w il...

  • Page 10

    10 before using the machine the first time fill engine with oil. 1. The engine is shipped without oil. 2. Use sae 30 motor oil. 3. Fill oil to top of fill neck. Remove pump shipping plugs. 1. Remove the red plugs from the water inlet and the oil vent hole and discard them. 2. Check oil level in the ...

  • Page 11: Setting-Up The Machine

    11 setting-up the machine pre-operation checklist ; 1.) position the machine for easy access to all controls, power, and water supply. ; 2.) position the machine outdoors on a solid level surface. ; 3.) fill gas tank with gasoline. ; 4.) check engine oil. Use sae 30 motor oil. ; 5.) check the pump o...

  • Page 12: Start-Up Instructions

    12 start-up instructions i.) attach a garden hose your pressure washer is equipped with a garden hose quick couplers. Follow these steps to use the quick couplers. A.) spin the socket onto your garden hose. B.) spin the nipple into the machine’s water inlet (the nipple may already be spun into your ...

  • Page 13: Start-Up Instructions

    13 start-up instructions ii. Attach the pressure hose specifications: your pressure hose is equipped with 22mm thread-on quick couplers on both ends. One end threads onto the water outlet on the unloader and the other threads onto the gun inlet. The o-ring seals the connection so you only have to ti...

  • Page 14: Start-Up Instructions

    14 start-up instructions iii.) connect the lance your spray lance has the following features and benefits : connect the lance together using the 22mm thread-on quick coupler. The o-rings seal the connection so you only have to tighten the quick coupler hand tight. Features benefits •4 foot length • ...

  • Page 15: Start-Up Instructions

    15 start-up instructions iv.) turn the water supply on make sure the hose is not “kinked”. A kinked hose will provide insufficient water supply to the pump and will reduce its life. Make sure the hose remains unkinked after moving the pressure washer. V.) squeeze the trigger squeeze the trigger unti...

  • Page 16: Shut-Down Instructions

    16 shut-down instructions i.) turn the engine off. Ii.) turn the water supply off. Iii.) squeeze the spray gun trigger to relieve the system pressure. Iv.) remove the water supply garden hose from the pump inlet. V.) remove the high pressure hose from the pump outlet. Never disconnect the high press...

  • Page 17: Operation Instructions

    17 operation instructions i.) spray angle your pressure washer is equipped with a 0 to 80° adjustable nozzle designed to tackle a variety of cleaning jobs. Generally, narrow spray angles have greater cleaning impact, wider angles cover large areas in less time. Use small angles for the toughest clea...

  • Page 18: Operation Instructions

    18 operation instructions iii.) applying chemicals a.) spin the quick couple chemical injector onto the pump outlet hand tight. B.) submerge the suction strainer in a chemical solution. C.) adjust the nozzle holder to low pressure by pushing the adjustable nozzle out. You need to change to low press...

  • Page 19: Operation Instructions

    19 operation instructions iv.) adjusting the unloader valve the unloader valve determines the operating pressure of the pump. You can adjust the pressure by turning the black knob. However, the unloader is factory pre-set to the maximum system pressure. V.) safety relief backup the safety relief or ...

  • Page 20: Routine Maintenance

    20 routine maintenance i.) changing the engine oil refer to the engine manual for complete maintenance schedule and engine component identification. 1.) place an oil pan or container beneath the pressure washer cart. 2.) drain the old oil by removing the oil plug found near the base of the engine. T...

  • Page 21

    21 iii.) changing the pump oil 1.) place an oil pan or container beneath the pressure washer cart. 2.) drain the old oil by removing the oil plug found under the pump. 3.) replace the oil plug. 4.) remove the vented dipstick and fill with oil until half way up the sight glass. 5.) use a non-detergen...

  • Page 22

    22 winterizing the pressure washer 1.) disconnect the high pressure hose. Make sure all water is drained from the hose, gun, and lance. 2.) combine 1 gallon of water with one gallon of antifreeze in a pail. Elevate the pail so it is higher than the pump. 3.) attach a short garden hose (4-5 ft. Long)...

  • Page 23: Troubleshooting

    23 troubleshooting low/surging pressure causes solutions plugged nozzle remove nozzle, check for blockage and clean if necessary worn nozzle replace nozzle (#3.5) plugged inlet screen pull screen out carefully and clean unloader valve malfuncation repair/replace unloader restrictive water supply use...

  • Page 24: Accessories

    24 accessories 3/8 high pressure hose • 3000 psi rating • neopren e • one-wire braid rein fo rcem ent • bend restrictors prolong hose life item# length ship w t. 2203 30’ 7 lbs. 156992 50’ 10 lbs. 156993 100’ 20 lbs. High psi screw -type quick couplers • quick coupler #2211 quickly spins onto brass ...