Oil Burner Adjustment (Only Needed If White Exhaust Smoke Appears) - North Star M1574210J Owner's Manual

Oil Burner Adjustment (only needed if white exhaust smoke appears)

The oil burner is preset, and performance tested at
factory elevation of 1100 feet. Different altitudes may
require a one-time initial burner adjustment.
CAUTION: Improper fuel-air mixture
If white smoke appears from the burner exhaust vent
during start-up or operation, discontinue use and
readjust air bands.
Adjusting burner will require accessing it from
underneath the pressure washer while someone else
is operating the spray gun.
1. Locate the Air intake adjustment cover on
blower housing (fig06839) below. Observe the
position of the arrow on the cover relative to
the calibration numbers. (For unit 1574212:
0 is fully closed and 9 is fully open).
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
as follows: 1574212 (between 5-7).
LOCKING SET SCREW
Fig.06839
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 covers
counterclockwise (open) until white smoke
just starts to appear. Note: If no white smoke
appears use fully opened calibration number
for reference point.
6. Turn lever halfway back to the black
smoke/rumbling sound position previously
noted. Tighten the locking set screw.
7. Trigger gun on for 15 seconds and off for 5
seconds. Repeat this cycle 5-10 times. If 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.
8. If large puffs of white smoke were observed in
step 7, close air intake cover by half a
calibration number. (example if calibration
number is set to 5 then close intake cover to
4.5)
9. Repeat step 7 & 8 until unit re-ignites without
large puffs of white smoke.
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