harmful emissions. Always clean after every 5 hours of operation. 1. Clean the cover and the area around it to keep dirt from falling into the carburetor chamber when the cover is removed. 2. Loosen knob by turning counterclockwise. Remove air filter cover and air filter. NOTE: To avoid creating a fire hazard or producing harmful evaporative emissions, do not clean filter in gasoline or other flammable solvent. 3. Wash the filter in soap and water. 4. Allow filter to dry. 5. Apply a few drops of oil to the filter; squeeze filter to distribute oil. 6. Replace parts. Tabs Air filter S When rail top is uneven, use a flat file to restore square edges and sides. File Rail Edges and Sides Square 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 pruner in the repair parts list. LUBRICATION Bar Oil Fill Cap S See GUIDE BAR AND CHAIN OIL under the OPERATION section. Air filter cover MUFFLER AND SPARK ARRESTING SCREEN BAR MAINTENANCE If your pruner cuts to one side, has to be forced through the cut, or been run with an improper amount of bar lubrication it may be necessary to service your bar. A worn bar will damage your chain and make cutting difficult. After each use, clean all sawdust from the guide bar and sprocket hole. To maintain guide bar: S Disconnect spark plug. S Loosen and remove bar clamp nut and chain brake. Remove bar and chain from pruner. S Clean the oil holes and bar groove after each 5 hours of operation. Remove Sawdust From Guide Bar Groove WARNING: The muffler on this product 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. For normal homeowner use, however, the muffler and spark arresting screen will not require any service. After 50 hours of use, we recommend that your muffler be serviced or replaced by your authorized service dealer. REPLACE SPARK PLUG Replace the spark plug each year to ensure the engine starts easier and runs better. Inspect 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 timing is fixed and nonadjustable. NOTE: This spark ignition system complies with the Canadian standard ICES-002. 1. Twist, then pull off spark plug boot. 2. Remove spark plug from cylinder and discard. 3. Replace with Champion RCJ-8Y spark plug and tighten securely with a 3/4 inch (19 mm) socket wrench. 4. Reinstall the spark plug boot. Oil Holes S Burring of guide bar rails is a normal process of rail wear. Remove these burrs with a flat file. 21