Advertisement
SERVICE AND
ADJUSTMENTS
ENGINE
ENGINE SPEED
Your engine speed has been factory set. Do not attempt to
increase engine speed or it may result in personal injury. If
you believe that engine is running too fast or too slow, take
your mower to an authorized service center for repair and
adjustment.
TO ADJUST CARBURETOR
(See Fig. 14)
Minor carburetor adjustments may be required to compen-
sate for differences in fuel, temperature, altitude or load.
The air cleaner and air cleaner cover must be assembled
to carburetor when running.
INITIAL ADJUSTMENT-
With the engine not running, gently turn idle mixture screw
clockwise until it just closes. Screw may be damaged by
turning it in too far.
Next open the screw one turn counter-clockwise.
This
initial adjustment will permit the engine to be started and
warmed up (approximately 5 minutes) pdor to final adjust-
ment,
NOTE: DO NOT adjusttop no load adjusting screw, tt was
pre-set at the factory,
FINAL ADJUSTMENT-
Place engine speed control lever in "IDLE" or"SLOW" (.il)
position. Adjust idle RPM by turning idle speed adjusting
screw to obtain 1700 RPM. Next, turn idle mixture screw in
(clockwise - lean mixture) until engine just starts to slow.
Then turn idle mixture screw out (counter-clockwise - rich
TOP NO
LOAD
SCREW
IDLE SPEED
ADJUSTING
SCREW
IDLE
MIXTURE
SCREW
FIG. 14
mixture) until engine runs unevenly.
Now turn idle mixture
screw
midway
between
rich and lean.
Engine
should
accelerate
smoothly.
If engine does not accelerate
prop-
erly, the carburetor
should be readjusted,
usuallyto
a richer
mixture,
by turning the idle
mixture screw counter-clock-
wise t/8 turn more.
IMPORTANT:
NEVER
TAMPER
:WITH THE ; ENGINE
GOVERNOR,
WHICH
IS FACTORY
SET
FOR PROPER
ENGINE SPEED.
OVERSPEEDING
THE ENGINE ABOVE
THE
FACTORY
HIGH
SPEED
SETTING
CAN
BE
DANGEROUS.
IFYOU THINK THE ENGINE-GOVERNED
HIGH
SPEED
NEEDS
ADJUSTING,
CONTACT
YOUR
NEAREST AUTHORIZED
SERVICE CENTER, WHICH HAS
PROPER EQUIPMENTAND
EXPERIENCE
TO MAKE ANY
NECESSARY
ADJUSTMENTS.
14
Advertisement
