Poulan PP4620AVL User Manual - Page 14

SERVICE WARNING: Disconnect the spark plug before performing maintenance except for carburetor adjustments. We recommend all service and adjustments not listed in this manual be performed by an authorized service dealer. MAINTENANCE SCHEDULE Check: Fuel mixture level . . . . Before each use Bar lubrication Before each use Chain tension Before each use Chain sharpness . . . . Before each use For damaged parts . . Before each use For loose caps Before each use For loose fasteners . . . Before each use For loose parts Before each use Inspect and Clean: Bar Before each use Complete saw After each use Air filter Every 5 hours* Chain brake Every 5 hours* Spark arresting screen and muffler Every 25 hours* Replace spark plug . Yearly Replace fuel filter . . . Yearly * Hours of Operation AIR FILTER CAUTION: Do not clean filter in gasoline or other flammable solvent to avoid creating a fire hazard or producing harmful evaporative emissions. Cleaning the air filter: A dirty air filter decreases engine performance and increases fuel consumption and harmful emissions. Always clean after 15 tanks of fuel or 5 hours of operation, whichever comes first. Clean more frequently in dusty conditions. A used aire filter can never be completely cleaned. It is advisable to replace your air filter with a new one after every 50 hours of operation, or annually, whichever comes first. 1. Loosen 3 screws on cylinder cover. 2. Remove cylinder cover. 3. Remove air filter. 4. Clean the air filter using hot soapy water. Rinse with clean cool water. Air dry completely before reinstalling. 5. Reinstall air filter. 6. Reinstall cylinder cover and 3 screws. TIghten securely. Air Filter Air Filter Screws 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. CLEANING THE SPARK ARRESTING SCREEN Clean every 25 hours of operation or annually, whichever comes first. Steel Backplate Muffler Muffler Bolts Aluminum Backplate Muffler Gasket Bolt Cover Locknut 1. Loosen and remove the 3 cylinder cover screws. Remove the cylinder cover. 2. Pull off the spark plug boot. 3. Loosen and remove the locknut from the bolt cover. Remove the bolt cover. 4. Loosen and remove the 2 muffler bolts. Remove the muffler and backplates. Notice the orientation of these parts for reassembling. 5. Locate the 2 outlet cover screws on the muffler. Loosen and remove both screws. Remove the outlet cover and spark arresting screen. BACK VIEW OF MUFFLER Outlet Cover Muffler Screws Spark Arresting Screen 6. Clean the spark arresting screen with a wire brush. Replace screen if any wires are broken or screen is blocked after cleaning. 7. Reinstall spark arresting screen. 8. Reinstall outlet cover and 2 screws. En- sure outlet cover and both screws are reinstalled correctly to prevent damage to the saw (see illustrations). The exhaust outlets must face the chain brake (bar side) of the saw. 14