Burner Adjustment - North Star M157115C.2 Owner's Manual

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 Adjusting the burner will require you to access the burner of the pressure washer while
Correction someone else is operating the spray gun.
Detailed instructions:
1. Locate the Air intake adjustment cover on blower housing (fig06839) below. Observe
2. Make sure burner is cool to the touch before attempting adjustments.
3. 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
ignites.
(Note: Typical factory calibration is
between 6-8).
4. Locate and loosen the locking set
screw (fig06839) and rotate the cover clockwise (close) until either of following
happens: black smoke appears from the burner exhaust vent or a rumbling sound is
heard. Note: which number the arrow is near.
5. Slowly rotate air intake cover counterclockwise (open) until white smoke just starts
6. Turn lever halfway back to the black smoke/rumbling sound position previously
7. Trigger gun on for 15 seconds and off for 5 seconds. Repeat this cycle 5-10 times. If
8. If large puffs of white smoke were observed in step 7, close air intake cover by half a
9. Repeat step 7 & 8 until unit re-ignites without large puffs of white smoke.

Burner Adjustment

OIL BURNER ADJUSTMENT
(ONLY NEEDED IF WHITE EXHAUST SMOKE APPEARS)
the position of the arrow on the cover relative to the calibration numbers. (0 is fully
closed and 10 is fully open).
to appear. Note: If no white smoke appears use fully opened calibration number for
reference point.
noted. Tighten the locking set screw.
not large puffs of white smoke are observed inlet air intake adjustment is complete.
If large puffs of white smoke are observed on any re-ignitions this could be a sign
that the air intake is opened to wide and will need further adjustment.
calibration number. (example if calibration number is set to 5 then close intake cover
to 4.5)
LOCKING SET SCREW
35
Fig. 06839