North Star M157593E Owner's Manual

Burner Adjustment39Oil 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.WARNING: The burner adjustment procedure requires part ofan individual's body to be underneath the pressure washer while it iselevated. Always ensure the pressure washer is securely elevatedbefore working on the burner underneath.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 13 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.Figure 13LockingScrewRotatable AirIntake AdjustmentBandArrowheadBurner