Craftsman 917.271023 - Manual (Page 27)

control lever from slow to choke posi­
tion. Slowly move lever from choke to
fast position.
• Check to see if hole in throttle lever and
hole in speed control bracket are ,
aligned.
• If holes are not aligned, loosen cable
clamp screw and align the holes by
inserting a pencil or a 1/4" drill bit
through both holes.
• Pull throttle cable up to remove slack
and tighten cable clamp screw. Remove
alignment pencil or drill bit.
TO ADJUST CARBURETOR
The carburetor 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
fuei, temperature, altitude or load. If the
carburetor does need adjustment, proceed
as follows:
In general, turning the adjusting needles
in (clockwise) decreases the supply of fuel
to the engine giving a leaner fuel/atr mix­
ture. Turning the adjusting needles out
(counterclockwise) 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 nee­
dle is turned in too tight.
NOTE: The carburetor on this engine is
low emission. It is equipped with an idle
fuei 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.
• Be sure you have a clean air filter and
the throttle control cable is adjusted
properly (see above).
• Start engine and allow to warm for five
minutes. Make adjus^errts with engine
running and shift/motion controi lever in
neutral (N) position.
• Idle speed setting - With throttle control
lever in slow position, engine should
idle at 1750 RPM. If engine idles too
slow or fast, turn idle speed adjusting
screw in or out until correct idle is at­
tained.
• Idie fuel needle setting - With throttle
contrd lever in slow position, turn idle
fuel adjusUnent needle in (clockwise)
until engine begins to die and then turn
out (counterclockwise) until engine runs
rough. Turn needle to a point midway
between those two positions.
• Recheck idle speed. Readjust if neces­
sary.
ACCELERATION TEST-
• Move throttle control lever from slow to
fast position. If engine hesitates or dies,
turn idle fuel adjusting needle out
(counterclockwise) 1/8 turn. Repeat test
and continue to adjust, if necessary,
until engine accelerates smoothly.
High speed stop is factory adjusted. Do
not adjust - damage may 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 AUTHO­
RIZED service center/department, which
has proper equipment and experience to
make any necessary adjustments.
Cable Clamp
Screw
Speed control
Bracket
Throttle Lever
Idle Speed
Adjusting ------------
Screw
Idle Fuel
Adjusting Needle
27