Poulan 545146921 instruction manual Service and Adjustments

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Button

Air Filter

Air Filter Cover

INSPECT MUFFLER AND SPARK ARRESTING SCREEN

WARNING: The muffler on this prod- uct contains chemicals known to the State of California to cause cancer.

As your unit is used, carbon deposits build up on the muffler and spark arresting screen and must be removed to avoid creating a fire haz- ard or affecting engine performance.

For normal homeowner use, the muffler and spark arresting screen will not require any service. After 50 hours of use, we recom- mend that your muffler be serviced or re- placed by an authorized service dealer.

REPLACE SPARK PLUG

Replace the spark plug each year to ensure the engine starts easier and runs better. In- spect spark plug every 25 hours of usage. Clean and/or replace as necessary. Set spark plug gap at 0.025 inch (0.6 mm). Ignition tim- ing is fixed and nonadjustable.

1.Twist, then pull off spark plug boot.

2.Remove spark plug from cylinder and discard.

3.Replace with Champion RCJ-6Y spark plug and tighten securely with a 3/4 inch (19 mm) socket wrench.

4.Reinstall the spark plug boot.

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 the line exit tunnels on each side of the cutting head.

WARNING: Only replace cutting line with ON/OFF switch in the OFF position.

1.Remove and discard worn line before installing new line.

2.Use only 0.115 inch (3 mm) diameter Poulan PRO brand cut length line.

3.Insert one end of the line through the positioning tunnel.

4.Continue to feed line through tunnel until line is centered (leaving equal amounts on each side). See illustration below.

Positioning tunnel

5.Insert ends of line one at a time through the line exit tunnels.

6.Pull the line and make sure the line is ex- tended fully through the tunnels.

Line exit

Line exit

tunnel

tunnel

7.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.

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 clock- wise.

4.Thread replacement trimmer head onto the shaft by turning counterclockwise. Tighten until secure.

5.Remove the screwdriver.

CARBURETOR ADJUSTMENT

WARNING: Keep others away when making idle speed adjustments. The trimmer head, blade or any optional attachment will be spinning during most of this procedure. Wear your protective equipment and observe all safe- ty precautions. After making adjustments, the trimmer head, blade or any optional attachment must not move/spin at idle speed.

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.

S The trimmer head, blade or optional attachment moves/spins at idle.

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Contents PPB250E Safety Rules Operator SafetyUL Classified Product Notice Unit / Maintenance Safety Fuel SafetyLine Trimmer Safety Additional Safety RulesEdger Safety BLOWER/VACUUM SafetyBrushcutter Safety Cultivator Safety Hedge Trimmer SafetyPole Pruner Safety Proboscis noseSnow Thrower Safety High speed causing injuryKnow how to stop quickly Keep the rotor clear of debrisAssembly Installing Trimmer ATTACH- MentAdjusting the Handle Attaching the ShieldOperation HOW to Start Your Unit Installing Optional ATTACH- MentsStarting a Cold Engine Starting a Warm EngineOperating Position Cutting MethodsHearing Protection Tip of the lineMaintenance Inspect and Clean Unit and DE- CalsClean AIR Filter Check for Loose Fasteners and PartsService and Adjustments Seasonal Storage Fuel SystemEngine OtherTroubleshooting Table Cause Remedy Limited Warranty Ligations The U.S. EnvironmentalIntermediate 125 hours Extended 300 hours