Poulan P4500F User Manual - Page 10

SERVICE AND ADJUSTMENTS REPLACING THE LINE For unit to operate properly, the cutting line should be replaced when line becomes worn to less than 3 inches in length from the edge of each side of the cutting head. WARNING: Use only 0.095 inch (2,4 mm) diameter Poulan brand cut length line. Never use wire, rope, string, etc., which can break off and become a dangerous missile. 1. Remove and discard worn line before installing new line. 2. Clean entire surface of cutting head. 3. Insert ends of line into the two guide holes on front of cutting head. Guide Hole Guide Hole 4. Continue to feed line through the guide holes until the line is fully extended through the side exit holes. Side Exit Hole Side Exit Hole 2. Insert a small screwdriver into aligned holes. This will keep the shaft from turning while removing and installing trimmer head. Screwdriver 3. While holding the screwdriver in position, remove trimmer head by turning clockwise (looking from bottom of unit). 4. Thread replacement trimmer head onto the shaft by turning counterclockwise. Tighten until secure. 5. Remove the screwdriver. CARBURETOR IDLE SPEED ADJUSTMENT WARNING: Keep others away when making idle speed adjustments. The trimmer head will be spinning during this procedure. Wear your protective equipment and observe all safety precautions. The carburetor has been carefully set at the factory. Adjustments may be necessary if you notice any of the following conditions: S Engine will not idle when the throttle is released. Make adjustments with the unit supported so the cutting attachment is off the ground and will not make contact with any object. Hold the unit by hand while running and making adjustments. Keep all parts of your body away from the cutting attachment and muffler. To adjust idle speed: Allow engine to idle. Adjust speed until engine runs without stalling (idle speed too slow). S Turn idle speed screw clockwise to increase engine speed if engine stalls or dies. S Turn idle speed screw counterclockwise to decrease engine speed. Idle Speed Screw 5. Pull ends of line until line is tight. Correctly installed line will be the same length on both ends. REPLACING THE CUTTING HEAD 1. Align hole in the dust cup with the hole in the side of the gearbox by rotating the dust cup. Air Filter Cover If you require further assistance or are unsure about performing this procedure, contact an authorized service dealer or call 1--800--554--6723. 10