Poulan HD185H46B User Manual - Page 26

SERVIC A► UST WATS dER TO ADJUST CHOKE CONTROL (See Fig. 32) The choke control has been preset at the factory and adjustment should not be necessary. Check adjustment as described 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 (I\I) position. • Remove air cleaner cover, filter and cartridge plate to expose carburetor choke (see "AIR FILTER" in the Customer Responsibilities 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. CLAMP SCREW QUARTER CIRCLE -ej SWIVEL • With engine off turn idle mixture screw in (clockwise) closing it finger tight and then turn out (counterclockwise) 1-1/4 to 1-1/2 turns. FINALSETTING • Start engine and allow to warm for five minutes. Make final adjustments with engine running and shift/ motion control lever in neutral (N) position. • With throttle control lever in slow ( ) position, hold throttle lever against idle speed screw and adjust idle speed screw to obtain 1200 to 1400 RPM. • While still holding throttle lever against idle speed screw, turn idle mixture screw in (clockwise) until engine begins to die and then turn out (counterclockwise) until engine runs rough. Turn screw to a point midway between those two positions. • Continue to hold throttle lever against idle speed screw and adjust idle speed screw to obtain 900 to 1200 RPM. Release throttle lever. ACCELERATION TEST - • Move throttle control lever from slow (Mr►) 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 accelerates smoothly. High speed stop is factory adjusted. Do not adjust damage may result. FIG. 31 CHOKE CLOSED CASING CLAMP SCREW 0 r-\ CHOKE LEVER 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. IDLE SPEED SCREW FIG. 32 TO ADJUST CARBURETOR (See Figs. 33 & 34) The carburetor has been preset 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 mixture screw in (clockwise) decreases the supply of fuel to the engine giving a leaner fuel/ air mixture. Turning the mixture screw 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 and choke are adjusted properly (see above). 0 IDLE SPEED SCREW THROTTLE LEVER IDLE MIXTURE SCREW THROTTLE LEVER FIG. 33 FIG. 34 IDLE MIXTURE SCREW 26