Craftsman 917.273220 Owner's Manual page 30

TO ADJUST CHOKE CONTROL
The choke 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
follows:
• With engine not running, move choke
control (located on dash panel) to full
choke position.
• Remove air cleaner cover, filter and
cartridge plate to expose carburetor
choke (See "AIR FILTER" in the
Maintenance section of this manual).
• Choke should be closed. If it is not,
loosen casing clamp screw and move
choke cable until choke is completely
closed. Tighten casing clamp screw
securely.
• Reassemble air cleaner.
Closed for Full
Choke
TO ADJUST CARBURETOR
The carburetor has been present 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 the seats in carburetor may result if
screw is turned in too tight.
PRELIMINARY SETTING -
• Be sure you have a clean air filter, and
the throttle control cable is adjusted
properly (see "TO ADJUST
THROTTLE CONTROL CABLE" in the
Service and Adjustments section of
this manual).
• With engine off turn idle fuel adjusting
needle in (clockwise) closing it finger
tight and then turn out (counterclock-
wise) 1 turn.
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.
• The high idle is set at the factory and
cannot be adjusted.
• Idle speed setting - With throttle control
lever in slow position, engine should
idle at 1200 RPM. If engine idles too
slow or fast, turn idle speed adjusting
screw in or out until correct idle is
attained.
• Idle fuel needle setting - With throttle
control lever in slow position, turn idle
fuel adjusting needle in (clockwise)
until engine speed decreases and
then turn out (counterclockwise)
approximately 3/4 turn to obtain the
best low speed performance.
• Recheck idle speed. Readjust if
necessary.
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
eninge governor, which is factory set for
proper engine speed. Overspeeding the
engine above the factory high speed
settng 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.
30
TRACTOR -- MODEL NUMBER 917.273220
SCHEMATIC
RED
BATTERY
RED
A
FUSE
AMMETER
(OPTIONAL)
C G
WHITE
RED
BLACK
S
F
B
M
H
G
A1 B
RED
L A2
E
IGNITION
A
BLACK
SWITCH
D
PTO (DISENGAGED)
GREEN
SEAT SWITCH
(NOT OCCUPIED)
FUEL SHUT-OFF SOLENOID
BLUE
RED
CHARGING SYSTEM OUTPUT
15 AMP DC @ 3600 RPM
87
87A
86 85
30
RELAY
REMOVABLE
IGNITION SWITCH
CONNECTIONS
POSITION CIRCUIT "MAKE"
OFF M + G + A1 NONE
ON + LIGHTS B + A1 L + A2
ENGINE CONNECTOR
ON B + A1 NONE
REGULATOR
START B + S + A1 NONE
(PURPLE WIRE,
RED WIRE)
WIRING INSULATED CLIPS
CARBURETOR
NOTE: IF WIRING INSULATED
SOLENOID
CLIPS WERE REMOVED FOR
(RED WIRE,
SERVICING OF UNIT, THEY
BLUE WIRE)
SHOULD BE REPLACED TO
PROPERLY SECURE YOUR
WIRING.
BLACK
SOLENOID
RED
RED
WHITE
WHITE
ELECTRIC CLUTCH
CLUTCH / BRAKE
(PEDAL UP)
RED
85
BLACK
87
87A
OPERATOR
GREEN
PRESENCE
RELAY #1
BLACK
HOUR
BLUE
METER
BLACK
(OPTIONAL)
FUEL
LINE
SPARK PLUGS
IGNITION
(2 PLUGS
UNIT
ON TWIN CYL. ENGINES)
SMART SPARK
ELECTRONICS
DIODE
REGULATOR
YELLOW
PURPLE
RED
28 VOLTS AC @ 3600 RPM (REGULATOR DISCONNECTED)
BROWN
PTO SWITCH
POSITION CIRCUIT
OFF C + G, B + H
ON C + F, B + E, A + D
HEADLIGHTS
G F C
NON-REMOVABLE
H
CONNECTIONS
D
TRACTOR CONNECTOR
ENGINE
IGNITION SWITCH
SHORTING
"M" FOR ENGINE
(WHITE WIRE)
SHORTING
(BLACK WIRE)
OIL SENTRY OIL SENTRY
(GREEN WIRE)
OPTION
(YELLOW WIRE
TO LIGHT PKG.)
35
M
STARTER
BLACK
86
BLACK
30
BLACK
BLACK
GAP
ALTERNATOR
BLACK
E
B
A
BATTERY
CHARGING
(RED WIRE)
SWITCHED
+12V
(BLUE WIRE)