Throttle; Tines - Craftsman 917.292460 Owner's Manual

SERVICE AND ADJUSTMENTS
TO REMOVE BELT GUARD (See Fig, 22)
o Remove two (2) cap nuts and washers from side of belt
guard.
- Loosen-(do not remove) tine shield nut on underside of
tine shield.
o Pull belt guard out and away from unit.
o Replace belt guard by reversing above procedure. Be
sure slot in bottom of belt guard is under head of tine
shield bolt and all nuts are tightened securety.
CAP NUTS
BELT
GUARD
TINE SHIELD NUT
FIG, 22
ENGINE
TO ADJUST CARBURETOR (See Fig, 23)
The carburetor has a high speed fixed jet and has been
preset at the factory and adjustment should not be neces-
sary. However, minor adjustments may be required to
compensate for differences in fuel, temperature, altitude or
load. Jfthe carburetor does need adjustment, proceed as
fottows,
In general, turning the idle needle valve in (clockwise)
decreases the supply of fuel to the engine giving a leaner
fuel/air mixture. Turning the needle valve out (counter-
clockwise) increases the supply of fuel to the engine giving
a richer fueilair mixture.
IMPORTANT: DAMAGE TO THE NEEDLES AND THE
SEATS IN CARBURETOR MAY RESULT IF SCREWS
ARE TURNED IN TOO TIGHT.
PREUMINARY SET-rING
• Air cleaner assembly must be assembled to the carbu-
retor when making carburetor adjustments.
• With engine off, turn idle needle valve in (clockwise)
closing it finger tight and then turn valve out (counter-
clockwise) 1-1/2 turns.
F_[NAL SETTING
• Start engine and allow to warm for five minutes. Make
final adjustments with engine running at idle and tine
control lever in "OFF" position.
o With throttle control in "SLOW" position, turn idle needIe
valve in (clockwise) until engine begins to die then turn
out (counterclockwise) until engine runs rough. Turn
valve to a point midway between those two positions.
IDLE RPM ADJUSTMENT
To adjust idle RPM, rotate throttle linkage counter_
clockwise and hold against stop while adjusting idte
speed adjusting screw to obtain 1750 RPM. Release
throttle linkage,
ACCELERATION TEST
• Move throttle control lever from "SLOW" to "FAST"
position, tf engine hesitates or dies, turn idle needle
valve out (counterclockwise) 1/8 turn. Repeat test and
continue to adjust, if necessary, until engine acceler-
ates smoothly.
High speed stop is factory adjusted. Do not adjust or
damage may result,
iMPORTANT: NEVER TAMPER WITH THE ENGINE
GOVERNOR, WHICH tS FACTORY SET FOR PROPER
ENGINE SPEED. OVERSPEEDING THE ENGINE ABOVE
THE FACTORY HIGH SPEED SETTING CAN BE
DANGEROUS. tF YOU THINK THE ENGINE-GOVERNED
HIGH SPEED NEEDS ADJUSTING, CONTACT YOUR
NEAREST SEARS SERVICE CENTER/DEPARTMENT,
WHICH HAS PROPER EQUIPMENT AND EXPERIENCE
TO MAKE ANY NECESSARY ADJUSTMENTS.
THROTTLELINKAGE THROTTLE STOP
\
IDLE SPEED
ADJUSTING SCREW
IDLE NEEDLE VALVE
FIG. 23
17