North Star M157597AG, Owner'S Manual

Page: 37 / 64

Burner Adjustment
37
Oil Burner Adjustment
(only needed if white exhaust smoke appears)
The oil burner is preset and performance tested at the factory (elevation 1100 feet). Different
altitudes 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.
Burner
Correction Adjusting the burner will require you to access the burner from underneath the
pressure 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 instructed
in the "Operation" section of the manual. Have someone operate the spray
gun so the burner fires.
3. Locate the air intake adjustment band as shown in Figure 12 below. Observe
the position of the arrow on the air band relative to the calibration numbers
directly 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 smoke
appears from the burner exhaust vent. Note which number the arrow now
points 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 12
Locking
Screw
Rotatable Air
Intake Adjustment
Band
Arrowhead
Burner