;ERVICE AND
ENGINE
TO ADJUST THROTTLE CONTROL CABLE (See Fig, 29)
•Loosen cable clamp screw to allow cable to move,
•Move throttle control lever on upper handle to "FAST" position_
°Pull throttle cable out until engine bellcrank is back as far as it will go.
•Hold cable in this position and tighten clamp screw securely.
CLAMP SCREW
THROTTLE
CABLE
BELLCRANK
FIG. 29
ENGINE
TO ADJUST CARBURETOR (See Fig. 30)
ADJUSTMENTS
FINAL SETTING
•Start engine and allow to warm for five minutes. Make final adjustments with engine runningand drive control bar in "DISENGAGED" position°
•With throttle control lever in "SLOW" position, turn needle valve in (clockwise) until engine begins to die then turn out (counterclockwise) until engine runs
rough. Turn valveto a point midway between thosetwo positions.
IDLE RPM ADJUSTMENT
-To adjust idle RPM rotate throttle linkage counter_ clockwise and hold against stop while adjusting idle speed adjustingscrew to obtain 1750 RPM Release throttle linkage.
ACCELERATION TEST
•Move throttle control lever from "SLOW" to "FAST"
position, If engine hesitates or dies, turn needle valve out (counterclockwise) 1/8 turn. Repeat test and continueto 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 IS FACTORY SET FOR PROPER ENGINE SPEED. OVERSPEEDINGTHE ENGINE ABOVE THE FACTORY HIGH SPEED SETTING CAN BE
DANGEROUS. IF YOU THINK THE
HIGH SPEED NEEDS ADJUSTING, CONTACT YOUR
NEAREST SEARS SERVICE CENTER, WHICH HAS PROPER EQUIPMENT AND EXPERIENCE TO MAKE ANY
NECESSARY ADJUSTMENTS,.
THROTTLE LINKAGE | TH ROTTLE STOP |
The carburetor has been preset at the factory and adjust_ merit should not be necessary. However, minor adjust- ments may be required to compensate for differences in fuel, temperature, altitude or Ioad_ If the carburetor does need adjustment, proceed as folFows_
In general, turning the needle valve in (clockwise) de- creases the supply offuel to the enginegivinga leanerfue!/ air mixture° Turning the needle valve out (counterclock-
wise) increases the supply of fuel to the engine giving a richerfuel/air mixture.
IMPORTANT: DAMAGE TO THE NEEDLES AND THE
SEATS IN CARBURETOR MAY RESULT IF SCREWS ARE TURNED IN TOO TIGHT_
PRELIMINARY SETTING
•Air cleaner assembly mustbe assembledtothe carbu- retor when making carburetor adjustments.
•Be sure the throttle controlcable is adjusted properly (see above).
°With engine off turn needle valve in (clockwise) closing it finger tight and then turn valve out (counterclockwise)
IDLE SPEED
ADJUSTING SCREW NEEDLE VALVE
FIG. 30
19
