Poulan 1994-04 User Manual - Page 19

GENERAL MAINTENANCE A. MAINTENANCE SAFETY 1. Maintain the tool according to recommended procedures. Keep the cutting line at the proper length. 2. Never start the engine with the clutch shroud removed. The clutch can fly apart and cause serious injury. 3. Disconnect the spark plug before performing maintenance except for carburetor adjustments. 4. Make carburetor adjustments with the lower end supported to prevent trimmer line from contacting any object. 5. Keep others away when making carburetor adjustments. 6. Be sure trimmer head stops turning when engine idles. See "Carburetor Adjustments." 7. Replace trimmer head parts that are cracked, chipped, broken, or damaged in any other way before using the tool. 8. Use only .080" diameter WEED EATER brand line. Never use wire, rope, string, etc. 9. Use only genuine WEED EATER replacement parts as recommended. 10. Inspect the entire tool. Replace damaged parts. Check for fuel leaks and make sure all fasteners are in place and securely fastened. B. AIR FILTER NOTE: A dirty air filter decreases the life and performance of the engine and may increase fuel consumption and harmful emissions. 1. Clean the Air Filter: • Always after 5 tanks of fuel or 5 hours of operation, whichever is less. • More frequently, in dusty conditions. a. Loosen the two screws on the air filter cover enough to remove the cover from engine. b. Remove the air filter from the cover. c. Wash filter in soap and water. d. Squeeze filter dry and replace in cover. CAUTION: Do not clean the air filter in gasoline or any other flammable solvent; doing so may create a fire hazard or produce harmful evaporative emissions. e. Reinstall the air filter cover, making sure the choke exit slot is placed over the choke lever. Figure 25 . CAUTION: I Make sure the air filter is fitted into the corners of the cover to keep dust from entering the engine and causing engine damage. NOTE: If replacing the air filter, see the Accessory List for proper part number. Choke Exit Slot 4503 Air Filter Also Choke Lever Air Filter Cover Figure 25 Corners C. BLADE SHARPENING A WARNING Always stop the engine before sharpening a blade. The blade will continue to spin after the engine stops or after the throttle trigger has been released. Make sure the blade has stopped coasting and disconnect spark plug before performing work on blade. 1. The blade is reversible. When the cutting edge on one side becomes dull, turn the blade over. When both sides of cutting edges become dull, the blade may be resharpened. 2. Check blades for flatness periodically. Lay the blade on a flat surface and inspect the blade for flatness before sharpening. Throw away a blade that is not flat. 3. File or grind each edge in the same manner to maintain a balanced blade. Figure 26 . A WARNING Always replace a blade that is bent, warped, cracked, broken, or damaged in any other way. Never attempt to straighten and re-use a damaged blade. Use only the specified replacement blade. I CAUTION: I Wear protective gloves when handling or performing maintenance on the blade to help avoid injury. A WARNING To prevent the blade from cracking or flying apart after sharpening, do not file within 1/4 inch of the radii shown in Figure 26 . File or Grind Each Edge in the Same Manner to Maintain a Balanced Blade. 1/4 Inch -s re- Maintain Radius Maintain Radiu Sharpen This Area Only Figure 26 - 19 -