Engine; To Adjust Throttle Control Cable; To Adjust Carburetor; Acceleration Test - Craftsman 917.272059 Owner's Manual

ENGINE
Maintenance, repair, or replacement of the
emission control devices and systems, which
are being done at the customers expense,
may be performed by any non-read engine
repair establishment or individual. Warranty
repairs must be performed by an authorized
engine manufacturer's service outlet.
TO ADJUST TI-IRO'R'LE CONTROL
CABLE
The throttle control has been preset at the
factory and adjustment should not be
necessary. Check adjustment as described
below before loosening cable. If adjustment is
necessary, proceed as follows:
1. With engine not running, move throttle
control lever from slow to choke position.
Slowly move lever from choke to fast
position.
2. Chock 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 fueVair mixture.
Tuming the adjusting needles out (counter-
clockwise) increases the supply of fuel to the
engine giving a richer fuel/air mixture.
IMPORTANT: Damage to the needles end
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 clean air filter and the
throne control cable is adjusted properly
(see above).
2. Start engine and allow to warm for rr_,e
minutes. Make adjustments with engine
running and shift/motion control lever in
neutral (N) position.
3. Idle soeed setting - v_r_hthrottle 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 attained.
4. Idle fuel needle setting - With throttle
control lever in slow position, tum idle fuel
adjustment 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.
5. Recheck idle speed. Readjust if neces-
sary.
ACCELERATION TEST-
6. Move throttle conb'ol lever from slow to
fast position. If engine hesitates or dies,
tum 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
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 equip-
ment and experience to make any
necessary adjustments.
Cable _:::::_
Clamp _1_ ='=c==,.--
Screw _,_
Speed Control h'
Bra cket "---"------_] _
ver
Idle Speed
Adjusting_ I
Sorow
IdleFuel II
Adjusting --/11- I I
Noed,e III
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