Loading ...
Loading ...
Loading ...
........ ,........ __ Ji,,ij
$ RVICE AN
TO ADJUST CARBURETOR (See Figs, 36 &
37)
The carburetor has been preset at the factory and adjust-
ment should not be necessary. However, minor adjust-
ment may be required to compensate for differences in fuel,
temperature, altitude or load. If the carburetor does need
adjustment, proceed as follows:
in general, turning the mixture screw in (clockwise) de-
creases the supply of fuel to the engine giving a leaner fuel/
air mixture. Turning the mixture screw out (counterclock-
wise) increases the supply of fuel to the engine giving a
richer fuel/air mixture.
IMPORTANT: DAMAGE TO THE NEEDLES AND THE
SEATS IN CARBURETOR MAY RESULT IF SCREW IS
TURNED IN TOO TIGHT.
i ii, ,11,,111,
NTS
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_ iF YOU THINK THE ENGINE-GOVERNED
HIGH SPEED NEEDS ADJUSTING, CONTACT YOUR
NEAREST AUTHORIZED SERVICE CENTER/
DEPARTMENT, WHICH HAS PROPER EQUIPMENT AND
EXPERIENCE TO MAKE ANY NECESSARY
ADJUSTMENTS.
PRELIMINARY SETTING -
° Be sure you have a clean air filter, and the threttle
control cable and choke are adjusted properly (see
above).
, With engine off turn idle mixture screw in (clockwise)
closing it finger tight and then turn out (counterclock-
wise) 1-1/4 to 1-1/2 turns.
FINAL SETTING -
° Start engine and allow to warm for five minutes. Make
final adjustments with engine running and shift/motion
control lever in neutral (N) position.
,' With throttle control lever in stow (,_) position, hold
throttle lever against idle speed screw and adjust idle
speed screw to obtain 1200 to 1400 RPM.
, While stitl holding throttle Iever against id{e speed
screw, turn idle mixture screw in (clockwise) until
engine begins to die and then turn out (counterclock-
wise) until engine runs rough_ Turn screw to a point
midway between those two positions.
• Continue to hold throttle lever against idle speed screw
and adjust idle speed screw to obtain 900 to 1200
RPM. Release throttle lever.
ACCELERATION TEST -
o Move throttle control lever from slow (,_,) to fast (,_)
positfon. If engine hesitates or dies, turn idle mixture
screw out (counterclockwise) 1/8 turn. Repeat test
and continue to adjust, if necessary, until engine accel-
erates smoothly.
High speed stop is factory ad._ustedo Do not adjust
damage may result.
tDLE SPEED
SCREW
IDLE MIXTURE
SCREW
THROTTLE
LEVER
FIG. 36
1DLE SPEED (___*'_
LEVER
IDLE MIXTURE
SCREW
FIG. 37
26
Loading ...
Loading ...
Loading ...