Craftsman 917.25693 owner manual Engbne, TO ADJUST THROTTLE CONTROL CABLE See Fig

ENGBNE

TO ADJUST THROTTLE CONTROL CABLE

(See Fig. 34)

The throttle control has been preset at the factory and adjustment should notbe necessary. Checkadjustment as described below before loosening cable, If adjustment is necessary, proceed as follows:

oWith engine not running, move throttle control lever from "SLOW" to "CHOKE" position° Slowly move lever from "CHOKE" to "FAST" position..

oCheckthathotes"A" in governorcontrotfeverandhote

in governor ptate tine-up. If holes "A" are not aligned, loosen clamp screw and move throttle cable until holes are aligned. Tighten clamp screw securely.

GOVERNOR	GOVERNOR
CONTROL LEVER	CONTROL PLATE

\

/

	CLAMP	THROTIFLE
HOLES "A"	SCREW	CABLE

{=IG. 34

TO ADJUST CARBURETOR (See Fig. 35)

The carburetor has been preset at the factory and adjust- ment should not be necessary. However, minor adjust- ment may be required to compensate for differences in fuel, temperature, altitude or Ioad_ If the carburetor does need adjustment, proceed as follows:

In general, turning idle mixture valve in (clockwise) de-

creases the supply of fuel to the engine giving a leaner fuel/ air mixture. Turning the idle mixture valve out (counter-

clockwise) increases the supply of fuel to the engine giving a richer fuel/air mixture

IMPORTANT: DAMAGE TO THE NEEDLE VALVE AND

THE SEAT tN CARBURETOR MAY RESULT IF SCREW 1S TURNED 1N TOO TIGHT

NTS.....................:-

PRELIMINARY SETTING -

•Aircleaner assembly must be assembled to the carbu- retor when making carburetor adjustments..

•Be sure the throttle control cable is adjusted properly (see above)°

°With engine off turn idle mixture valve in (clockwise) closing it finger tight and then turn out (counterclock- wise) 1 full 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" position.

oMove throttle control lever to "SLOW" position, With

finger, rotate and hold throttle lever against idle speed screw,, Turn idle speed screw to attain 1750 RPM,

•While still holding tflrottle lever against idle speed

screw, turn idle mixture valve in (clockwise) until en- gine begins to die and then turn out (counterclockwise) until engine runs rough,. Turn valve to a point midway between those two positions,, Release throttle lever.

ACCELERATION TEST -

oMove throttle control lever from "SLOW" to "FAST" position° If engine hesitates or dies, turn idle mixture

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 - 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 ENGfNE-GOVERNED

HIGH SPEED NEEDS ADJUSTING, CONTACT YOUR NEAREST AUTHORIZED SERVICE CENTER, WHICH HAS PROPER EQUIPMENT AND EXPERIENCE TO MAKE ANY NECESSARY ADJUSTMENTS,

THROTTLE LEVER, SPEED SCREW

IDLE MIXTURE VALVE

FIG, 35

23