Craftsman 917.272054 - Manual (Page 26)

ENGfNE
Maintenance, repair, or replaoement of
the emission controi devices and sys­
tems, which are being done at the
customers expense, may be performed
by any non-road engine repair estabiish-
ment or individuai. Warranty repairs must
be performed by an authorized engine
manufacturer's service outlet.
TO ADJUST THROTTLE CONTROL
CABLE
The throttle control has been preset at the
factory and adjustment should not be
necessary. Check adjustment as de­
scribed below before loosening cable. If
adjustment is necessary, proceed as
foiiows:
1. With engine not running, move throttle
control lever from slow to choke
position. Slowly move lever from
choke to fast position.
2. Check to see if hole in throttle lever
and hole in speed control bracket are
aligned.
3. 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.
4. 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
factory and adjustment should not be
necessary. 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 general, turning the adjusting needles
in (clockwise) decreases the supply of
fuel to the engine giving a leaner fuel/air
mixture. 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 seats in carburetor may result if
turned in too tight.
NOTE; The carburetor on this engine is
low 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.
1. Be sure you have a dean air fiHer and the
throHle control cable is adjusted properly
(see above).
2. Start engine and aDow to vvarm for live
minutes. Make adjustments with engine
mnnirig and shifVnwtion control lever fo
neutral (N) Fxrsilion.
3. Ide speed settinQ - Wifo throttle control
lever in slow position, engine should idle
at 1750 RPM. If engine idte too slow or
fast, turn idle speed adjusting screw in or
out until correct idle is attained.
4. Ide fuel needte setting - Wrih throttle
control lever in slow position, turn ide fuel
ac|ustment neede in (clockwise) until
engsie begins to de and then turn out
(oounterdockwise) until erigine nrns
rough. Turn neede to a point midway
between those two posies.
5. Recheck ide speed. Read^t if neces­
sary.
ACCELERATION TEST-
6. Move throttle control lever from staw to
fast position, if engine hesitates or des,
turn ide fuel ac|usting needle out
(counterclockwise) 1/8 tun. Repeat test
and cxmtinue 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 feclory 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 a Sears or other
qualified service center, which has proper
equipment and experience to make any
necessary adjustments.
Cable
Clamp -
—
Screw
26
Idle Speed
Adjustini
Screw
Idle Fuel
Adjusting
Needle