North Star M157597AG Owner's Manual

Burner Adjustment37Oil Burner Adjustment(only needed if white exhaust smoke appears)The oil burner is preset and performance tested at the factory (elevation 1100 feet). Differentaltitudes may require a one-time initial burner adjustment.CAUTION:If white smoke appears from the burner exhaust vent during start-up or operation,discontinue use and readjust air bands.Specific steps for burner correction are given below.BurnerCorrectionAdjusting the burner will require you to access the burner from underneath thepressure washer while someone else is operating the spray gun.Detailed instructions:1. Make sure burner is cool to the touch before attempting to adjust.2. Begin operation of the pressure washer and switch on the burner, as instructedin the "Operation" section of the manual. Have someone operate the spraygun so the burner fires.3. Locate the air intake adjustment band as shown in Figure 12 below. Observethe position of the arrow on the air band relative to the calibration numbersdirectly to the right. (Note: Factory calibration starts out at close to "1".)4. Loosen the locking screw and rotate the air band closed until black smokeappears from the burner exhaust vent. Note which number the arrow nowpoints to.5. Slowly open the air band until white smoke just starts to appear.6. Turn air band halfway back to the black smoke position previously noted.Tighten the locking screw.7. Now fine tune the burner air by adjusting the shutter:Figure 12LockingScrewRotatable AirIntake AdjustmentBandArrowheadBurner