Poulan 1994-01 User Manual - Page 20

d. DECELERATION CHECK 1. Allow engine to idle, then squeeze throttle trigger fully. 2. Allow engine torunat fullspeed for about 1 second. 3. Release the throttle trigger to the idle position and listen to the deceleration of the engine. It must return to idle smoothly and within 1 to 2 seconds. a. If performance is satisfactory, proceed to step "4." b. If the engine slowly or erratically returns to idle or idles erratically, repeat "Idle Speed Adjustment" or continue through Low Speed Mixture and High Speed Mixture Adjustments to obtain proper deceleration. 4. Recheck idle speed. e. LOW SPEED MIXTURE ADJUSTMENT 1. Allow engine to idle. 2. Turn the low speed mixture screw (Figure 25 ) slowly clockwise until the speed starts to drop. Note this position. 3. Turn the low speed mixture screw counterclockwise until the speed increases and then starts to drop again. Note this position. -.-Setthalowspeedfl -eviarthe midpoint between the two positions. 5. Follow instructions in "Acceleration Check" and "Deceleration Check," f. HIGH SPEED MIXTURE ADJUSTMENT I CAUTION: I Do not operate engine at full throttle for prolonged periods while making high speed adjustments as damage to the engine can occur. 1. Support the lower end so the trimmer line is off the ground and will not nuacp contact with any object. 2. Allow engine to idle, then squeeze throttle trigger fully. NOTE: Perform steps "3." through "5." at full throttle. 3. Turn high speed mixture screw (Figure 25 ) very slowly clockwise until engine speed is reduced. 4. Turn high speed mixture screw very slowly counterclockwise. Stop when the engine begins to run roughly. 5. Turn screw slowly the minimum amount clockwise until the engine runs smoothly 6. Follow instructions in "Acceleration Check" and "Deceleration Check". I CAUTION: I If the engine does not operate according to these instructions after repeating the adjusting steps, do not use the unit. Take it to your Authorized Service Dealer. High Speed Screw Low Speed Adjustment Screw "Nose Cone" Screws Idle Speed Adjustment Screw tiv Air Filter Cover Figure 25 E. STARTER ROPE • Replace a starter rope that breaks. A DANGER Neverstart the engine with the clutch shroud removed. The clutch will fly apart and cause serious injury. A WARNING Do not remove the retaining tab and screw or the pulley The spring beneath the pulley is under tension and can fly out and cause :serious injury. If any part of pulley housing assembly is damaged other than the rope, do not use unit Take it to your Authorized Service Dealer. 1. Disconnect spark plug wire. Figure 26 . 2. Removethe screwfrom the trigger housing. (refer to Moire 4). 3. Remove the trigger housing from the handlebar. 4. Carefully pull wire assembly out of the foam grip. 5. Loosen two "Nose Cone" screws and remove the tube from the clutch shroud. Figure 26 . 6. Reinove the four clutch shroud screws with the small hex wrench provided. Figure 26 . 7. Separate clutch shroud from engine. Figure 26 . - 20 - Clutch Shroud Screws "Nose Cone" Screws Spark Plug Wire Clutch Shroud Figure 26 A DANGER Use only a hand tool to remove the clutch. Do not use any type of motorized unit or strike the clutch in any way. Otherwise, the clutch will fly apart and cause serious injury. 8. Hold the "Flats" of the clutch with an adjustable wrench. Figure 27 (inset). Remove the nut counterclockwise with a wrench. NOITI Clutch willslide offthe crankshaft intact. Do not disassemble the dutch. 9. Remove the cupped washer, clutch, and large flat washer as shown in Figure 27 . 10.Remove pulley housing from engine. Figure 27 .