,11,111111,1 ,,11 ii, i i,,111i iii i ,i,iiiiiiiii1,11 iiii AND ADJUSTMENTS ,1111 ,11,111,,, i, iiiii ........................... i,i1,111 iI i i TO ADJUST CARBURETOR (See Figs. 32 and 33) High speed stop is factory adjusted° Do not adjust - damage may resutt. 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 load. If the carburetor does need adjustment, proceed as follows: 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 ENGINE-GOVERNED HiGH SPEED NEEDS ADJUSTING, CONTACT YOUR NEAREST AUTHORIZED SERVICE CENTER/ DEPARTMENT, WHICH HAS PROPER EQUIPMENT AND EXPERIENCE TO MAKE ANY NECESSARY ADJUSTMENTS, In general, turning the mixture screw in (clockwise) de- creases the supply of fuel to the engine giving a leaner fuel/ air mixture. Turning the mixture screw out (counterclock- wise) 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 and choke are adjusted properly (see above)_ With engine off turn idle mixture screw in (clockwise) closing it finger tight and then turn out (counterclock- wise) 1-1/4 to 1-1/2 turns. FINAL SETTING - THROTTLE LEVER , Start engine and allow to warm for five minutes.. Make fina_adjustments with engine running and shift/motion control lever in neutral (N) position.
With throttle control lever in slow (,_) position, hold throttle tever against idle speed screw and adjust idle speed screw to obtain 1200 to 1400 RPM.. FIG. 32 While still holding throttle lever against idle speed screw, turn idle mixture screw in (clockwise) until engine begins to die and then turn out (counterclock- wise) until engine runs rough. Turn screw to a point midway between those two positions..
IDLE SPEED SCREW Continue to hold throttle lever against idle speed screw and adjust idle speed screw to obtain 900 to 1200 R PM Release throttfe lever° ACCELERATION TEST - Move throttle control lever from slow (,_=_)to fast (,_) position° If engine hesitates or dies, turn idle mixture screw out (counterclockwise) 1/8 turn. Repeat test and continue to adjust, if necessary, until engine accel- erates smoothly. / THROTTLE LEVER _E MIXTURE SCREW FIG. 33 24