Craftsman 917.270711 - Manual (Page 27)

TO ADJUST THROTTLE COHTROL
CABLE '
The tbmttle wntrol has been preset at the
factory and adjustment should not be nec­
essary. Check adjustment as descn'bed
below before loosening cable. If acQust-
ment is rrecessary, proceed as follows:
• With engine not running, move throttle
- control lever from slow to choice posi­
tion. Slowly move lever fromrbhoke to
fast position.
• Check that holes "A” in goverrwr control
lever and hole in governor plate line-up.
If Rolesr'A” are not aligned, loosen
clamp screw and rrrave throttle cable
until holes are aligned. Tighten clamp
screw securely.
• —Goyernpr.,--. Governor
TQ ADJUST CARBURETOR
NOTE: The carburetor on this engine is
lo\v emission. It is equipped with an idle
fuel adjusting needle with a limiter cap,
which allows some adjustment within the
limits allowed by the cap. Do not attempt
to remove the limiter cap. The limiter cap
cannot be removed without breaking the
adjusting needle.
’"The car№retor has been preset at the fac­
tory and adjustment should not be neces­
sary. However, minor adjustment may be
_ required to compensate for differences in
fuel, temperature, altitude or load. If the
carburetor does need adjustment, proceed
as follows:
In ganeral, turning idle mixturé valve in
(clockwise) decreases the supply of fuel to
tile engme giving a learier fuel/air mixture.
Turning t^ idle mixture valve out
(cotNfiterclockwise) increases the isuppiy of
fuel to the arr^'he giving a richer fuel/áir
rni)d^re^
IMPQpTAI^: Damage to the needle valve
and the seal in carburetor may result if
screw is turned in too tight.
PREUMINARY SETTING-
• Mr cleaner assembly must be assem­
bled to the carburetor when making car­
buretor adjustmer^.
• Be sure the throttle control cable is
acyusted properly (see above).
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.
• Move throttle corrtrol lever to slow posi­
tion. With finger, rotate and hold throttle
lever against kfie speed screw. Turn idle
speed screw to attain 1750 RPM.
• While still holding throttle lever against
idle speed screw, turn idle mixture valve
full travel clockwise then counterclock­
wise until engine runs rough. Turn valve
to a point midway between those two
positions. Release throttle lever.
ACCELERATION TEST-
• Move throttle control lever from slow to
fast position. If engine hesitates or dies,
turn idle mixture valve out (counter­
clockwise) 1/8 turn. Repeat test and
continue to adjust, if necessary, until
engine accelerates smoothly.
High speed stop is factory adjusted. Do
not adjust—darnage rhay result
,
IMPORTANT: Never tamper with the
engine governor, which is factory set for
proper engine speed; overspeeding the
engine above the factory high speed set­
ting can be dangerous, if you think the
engine-governed high speed needs
adjusting, contact your nearest authorized
service center, which has proper equip­
ment to make any necessary adjustments.
Idle Speed Screw'' Throttle
limiter
27