North Star M157305Y Owner's Manual

Also see for 157305: Installation, operation and maintenance manual Installation, operation and maintenance manual Owner's manual Installation, operation and maintenance manual Instructions for setup

North Star M157305Y Owner's Manual Manual pdf 24 page image

24Oil Burner Adjustment (only needed if white exhaust smoke appears)The oil burner is preset and performance tested atfactory elevation of 1100 feet. Different altitudes mayrequire a one-time initial burner adjustment.CAUTION: Improper fuel-air mixtureIf white smoke appears from the burner exhaust ventduring start-up or operation, discontinue use andreadjust air bands.Adjusting burner will require accessing it fromunderneath the pressure washer while someone else isoperating the spray gun.1. Make sure burner has cooled before attempting toadjust.2. Use handle to tip pressure washer forward sofront edge of burner fuel tank is resting on theground. Prop rear axle up in this position with two16” jack stands.WARNING: Crushing hazardThe burner adjustment procedure requires part of anindividual’s body to be underneath the pressure washerwhile it is elevated. Always ensure the pressure washeris elevated and securely blocked before working on theburner underneath.3. Begin operation of pressure washer and switchon burner, as instructed in “Operation” section.Have someone operate spray gun so burner fires.4. Locate air intake adjustment band as shown inFigure 24 below. Clear if necessary to seenumbers. Observe position of arrow on air bandrelative to calibration numbers directly to the right.(Factory calibration starts out at close to “1”)Figure 245. Loosen locking screw and rotate air band closeduntil black smoke appears from burner exhaustvent. Note which number arrow points to.6. Slowly open air band until white smoke just startsto appear.7. Turn air band halfway back to black smokeposition previously noted. Tighten locking screw.8. Now fine-tune burner air by adjusting shutter:a. Locate shutter as shown in Figure 25 below.Shutter is a thin circular metal plate located onoutside of air band. It adjusts independentlyfrom air band and is used to fine-tune theamount of intake air.b. Observe the aluminum pointer attached to theshutter. It points to the same set of calibrationnumbers as air band arrow. Observe whichnumber it points to at start of this adjustmentstep.c. Loosen shutter lock screw. Turn shutter usingthe aluminum pointer until exhaust is cleanest.Tighten shutter lock screw.Figure 25 – Shutter AdjustmentLockingScrewRotatable AirIntakeAdjustmentBandArrowheadBurnerShutterLock ScrewShutter