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97-6068, 97-6131 • REV. 3/06
OPERATOR’S MANUAL
PRESSURE WASHER
20
MAINTENANCE
FUEL AIR ADJUSTMENT: BECKETT
FUEL AIR ADJUSTMENT: WAYNE
functions properly. This can be done by operating the
machine and checking to see that when the trigger on
the spray gun is in the off position, the burner is not firing.
Fuel Pressure Adjustment:
To adjust fuel pressure, turn the adjusting screw with a
standard screwdriver (located on the fuel pump) clock-
wise to increase, counterclockwise to decrease. Do not
exceed 200 PSI.
Air Adjustment
Machines are preset and performance tested at the
factory — elevation 100' above sea level. A one time
correction for your location will pay off in economy, per-
formance and extended service life. If a smoky or eye-
burning exhaust is being emitted from the stack, two
things should be checked.
First, check the fuel to be certain that kerosene or No.
1 home heating fuel is being used.
Next, check the air adjustment on the burner. An oily,
black, smoky fire indicates a lack of air and the air band
should be moved to allow the air to flow through the burner.
Sharp, eye-burning white fumes indicate too much air
flowing through the combustion chamber. The air band
should be moved to allow less air to flow through the
burner.
To adjust: start machine and turn burner ON. Loosen
the two locking screws found in the air shutter openings
(refer to illustrations) and close air shutter until black
smoke appears from burner exhaust vent. Note air band
position. Next, slowly open the air shutter until white
smoke just starts to appear. Turn air shutter halfway back
to the black smoke position previously noted. Tighten lock-
ing screws.
If the desired position cannot be obtained using only the
air shutter, lock the air shutter in as close a position as
can be obtained, then repeat the above procedure on
the air band setting.
Air Band
Adjustment
Screw
Pressure
Gauge Port
Air Band
Fuel Pump
Pressure
Adjustment
Screw
Air Band
Transformer
Fuel
Pump
Pressure
Adjustment Screw
Air Band
Adjustment
Screw
Pressure
Gauge Port