TM 5-4520-253-13
lNSPECT/SERVICE/ADJUST/REMOVE/lNSTALL
CARBURETOR
(CONT)
ADJUSTMENT:
1.
2.
3.
4.
5.
Do not operate heater in enclosure unless exhaust gases are
piped outside. Exhaust gases contain carbon monoxide, a
colorless, odorless,
proper elimination
death.
Place HEATER-OFF-FAN switch in
operating temperature.
deadly poisonous gas. Failure to provide
of the exhaust can cause severe illness or
HEATER position. Allow heater to heat up to normal
Open front access door (1) and locate fuel needle (2).
When turning needle valve all the way in,
light pressure to avoid damage to valve.
Turn fuel needle (2) clockwise as far as possible.
do not force. Use
Turn fuel needle (2) counterclockwise in 1/8-turn increments.
Increase fuel flow until there is no
odor of unburned fuel and no smoke in exhaust fumes.
In low ambient temperatures it may be necessary to increase fuel flow to achieve smooth burner
operation.
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