Craftsman 305cc Owners Manual - Page 13

AIR CLEANER The air cleaner prevents damaging dirt, dust, etc., from entering the carburetor and being forced into the engine and is important to engine life and performance. Never run your engine without air cleaner completely assembled. To Service Air Cleaner: Service foam filter after every 25 hours of use, or at least once a season. Service paper filter every 100 hours of use, or at least once a season. Service foam filter and paper filter more often under dusty conditions. • Remove wing nut and cover. Remove paper filter. See figure 15. • Remove and inspect filters for discoloration or dirt accumulation. If necessary, service as follows. • Foam filter: Clean and re-oil every three months or every 25 operating hours. Clean and re-oil daily if used in extremely dusty conditions. • Wash in water and detergent solution. Squeeze (don't twist) until all dirt is removed. • Rinse thoroughly in clear water. • Wrap in a clean cloth and squeeze (don't twist) until completely dry. • Saturate with engine oil. Squeeze (don't twist) to distribute oil and remove excess oil. • Paper filter: Replace once a year or every 100 operating hours, or more often if used in extremely dusty conditions. • Clean inside of base and cover thoroughly. • Replace paper and foam filters, making sure the screen side is toward the paper filter. Replace cover and wing nut. Tighten securely. Base Paper Filter / Foam Filter Wing CLEAN ENGINE Clean engine periodically. Remove dirt and debris with a cloth or brush. Cleaning with a forceful spray of water is not recommended as water could contaminate the fuel system. Yearly or every 25 hours, whichever occurs first, remove the blower housing and clean the areas shown in figure 16 to avoid overspeeding, overheating and engine damage. Clean more often if necessary. 4j_WARNFINLGE:R AREAPETROIORDEICMAOLVLYE ACLLLEAGNRAMSUSF, DIRT AND COMBUSTIBLE DEBRIS. Cooling Fins FIGURE 16. SPARK PLUG The spark plug should be cleaned and the gap reset to .030" at least once a season or every 50 hours of operation. See figure t7. Spark plug replacement is recommended at the start of each season. Refer to engine parts list for correct spark plug type. NOTE: Do not sandblast spark plug. Spark plug should be cleaned by scraping or wire brushing and washing with a commercial solvent. .030" Feeler Gauge Cover-----.._ FIGURE 15. FIGURE 17. Plug MUFFLER Do not operate the chipper-shredder without a muffler or tamper with the exhaust system. Damaged mufflers or spark arresters could create a fire hazard. Inspect periodically, and replace if necessary. If your engine is equipped with a spark arrester screen assembly, remove every 50 hours for cleaning and inspection. Replace if damaged. 13