Poulan 3450 User Manual - Page 14

S Wash the filter in soap and water. Air dry completely before reinstalling. S Replace parts. sary to service your bar. A worn bar will damage your chain and make cutting difficult. After each use, ensure ON/STOP switch is in the STOP position, then clean all sawdust from the guide bar and sprocket hole. To maintain guide bar: S Move ON/STOP switch to the STOP posi- tion. S Loosen and remove chain brake nuts and chain brake. Remove bar and chain from saw. S Clean the oil holes and bar groove after each 5 hours of operation. INSPECT MUFFLER AND SPARK ARRESTING SCREEN As the unit is used, carbon deposits build up on the muffler and spark arresting screen and must be removed to avoid creating a fire hazard or affecting engine performance. Replace the spark arresting screen if breaks occur. Spark Arrestor Screen Remove Sawdust From Guide Bar Groove Sprocket Hole Oil Holes S Add lubricant to sprocket hole after each use. S Burring of guide bar rails is a normal process of rail wear. Remove these burrs with a flat file. S When rail top is uneven, use a flat file to restore square edges and sides. File Rail Edges and Sides Square CLEANING THE SPARK ARRESTING SCREEN Clean every 25 hours of operation or annually, whichever comes first. S Loosen and remove the muffler cover screws. S Remove the muffler cover (cover snaps off muffler body). S Remove muffler diffuser and spark arrest- ing screen assembly. Notice the orientation of parts for reassembly. S Clean the spark arresting screen with a wire brush. Replace screen if breaks are found. S Replace any broken or cracked muffler parts. S Reinstall diffuser and spark arresting screen assembly with holes facing up and toward muffler cover. S Reinstall muffler cover and screws. Tighten securely. CARBURETOR ADJUSTMENTS Your carburetor is equipped with limiter caps. Carburetor adjustment is a complicated task. We recommend that you take your unit to an authorized service dealer. Damage will occur if you turn the needles beyond the limiter stops. BAR MAINTENANCE If your saw cuts to one side, has to be forced through the cut, or been run with an improper amount of bar lubrication it may be neces- Worn Groove Correct Groove Replace guide bar when the groove is worn, the guide bar is bent or cracked, or when excess heating or burring of the rails occurs. If replacement is necessary, use only the guide bar specified for your saw in the repair parts list or on the decal located on the chain saw. CHAIN SHARPENING Chain sharpening is a complicated task that requires special tools. We recommended you refer chain sharpening to a professional chain sharpener. IGNITION TIMING Ignition timing is fixed and nonadjustable. SPARK PLUG The spark plug should be replaced each year to ensure the engine starts easier and runs better. S Loosen and remove the screws on the cyl- inder cover. S Remove the cylinder cover. S Pull off the spark plug boot. S Remove spark plug from cylinder and dis- card. S Replace with Champion RCJ--7Y spark plug and tighten securely with a 3/4 inch socket wrench. Spark plug gap should be 0.025 inches. S Reinstall the spark plug boot. S Reinstall the cylinder cover and screws. Tighten securely. 14