Craftsman 917.270660 - Manual (Page 27)

TO REMOVE HOOD AND GRILL AS­
SEMBLY
• Raise hood.
• Unsnap headlight wire connector.
• Stand in front of tractor. Grasp hood at
sides, tilt toward engine and lift off of
tractor.
• To replace, reverse above procedures.
Headlight
Wire
Connector
ENGINE
Manintenance, repair, or replacement of
the emission control devices and systems,
which are being done at the customers
expense, may be performed by any non­
road engine repair estyablishment or indi­
vidual. Warranty repairs must be per­
formed 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 nec­
essary. Check adjustment as described
below before loosening cable. If adjust­
ment is necessary, proceed as follows:
* With engine not running, move throttle
control lever from slow to choke posi­
tion. Slowly move lever from choke to
fast position.
Governor Governor
• Check that holes “A” in governor con­
trol lever and hole in governor plate
line-up. If holes “A” are not aligned,
loosen clamp screw and move throttle
cable until holes are aligned. Tighten
clamp screw securely.
TO ADJUST CARBURETOR
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.
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
fuel, temperature, altitude or load. If the
carburetor does need adjustment, pro­
ceed as follows:
In general, turning idle mixture valve in
(clockwise) decreases the supply of fuel
to the engine giving a leaner fuel/air mix­
ture. Turning the idle mixture valve out
(counterclockwise) increases the supply
of fuel to the engine giving a richer fuel/air
mixture.
IMPORTANT:
Damage to the needle
valve and the seat in carburetor may re­
sult if screw is turned in too tight.
PRELIMINARY SETTING
• Air cleaner assembly must be as­
sembled to the carburetor when making
carburetor adjustments.
• Be sure the throttle control cable is ad­
justed 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 control lever to slow posi­
tion. With finger, rotate and hold throttle
lever against idle 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.