Craftsman 79481 Operation Manual - Page 11

CLEAN AIR FILTER A dirty air filter decreases engine performance and increases fuel consumption and harmful emissions. Always clean after every 5 hours of operation. Air Filter Knob Replace the spark arresting screen every 50 hours of operation or if any damage or breaks in the screen are noted. NOTE: Do not attempt to clean the spark arresting screen. 1. Loosen and remove 4 screws from starter cover housing. / Air Filter Cover Starter Cover Cleaning the air filter: 1. Clean the air filter cover and the area around it to keep debris from falling into the carburetor chamber when the cover is removed. 2. Loosen and remove air filter cover by turning knob counterclockwise. 3. Remove air filter. NOTE: Do not clean filter in gasoline or other flammable solvent. Doing so can create a fire hazard or produce harmful evaporative emissions. 4. Wash the filter in soap and water. 5. Allow filter to dry. 6. Replace parts. NOTE: An air filter that has been used for a long time can not be cleaned thoroughly. The air filter must be replaced if it can not be cleaned or becomes damaged. REPLACE SPARK PLUG Replace spark plug each year to ensure the engine starts easier and runs better. Set spark plug gap at 0.025 inch. Ignition timing is fixed, nonadjustable. 1. Twist, then pull off spark plug boot. 2. Remove spark plug from cylinder and discard. 3. Replace with Champion ROJ-6Y spark plug and tighten securely with a 3/4 inch socket wrench. 4. Reinstall the spark plug boot. INSPECT MUFFLER AND SPARK ARRESTING SCREEN _ik WARNING: The muffler on this product contains chemicals known to the State of California to cause cancer. 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. 2. Remove starter cover housing and muffler cover. 3. Loosen and remove 4 screws from the muffler hood. Spark Arresting Screen 4. Remove the muffler hood and spark arresting screen. 5. Install new spark arresting screen. 6. Reinstall muffler hood and 4 screws. Tighten screws securely. 7. Reinstall muffler cover. 8. Reinstall starter cover housing and 4 screws. Tighten screws securely. NOTE: If any part of the muffler is cracked, broken or damaged, we recommend that the muffler be replaced. CARBURETOR ADJUSTMENT The carburetor has been carefully set at the factory. Adjustments may be necessary if you notice any of the following conditions: • Engine will not idle when the throttle is released. -11 -