Craftsman 247.77605 Operator's Manual

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15SERVICE AND MAINTENANCEServicing the Air CleanerThe air cleaner prevents damaging dirt, dust, etc., from entering thecarburetor and being forced into the engine and is important to enginelife and performance. Never run the engine without an air cleanercompletely assembled.Replace the air cleaner every 25 hours of operation.1. Loosen screws that hold the air filter cover.2. Open cover and remove air filter. See Figure 12.3. Discard old air filter.4. Install new air filter.5. Close the cover and tighten screws.NOTE: If the filter is torn or damaged in any way, replace it.Check Engine Oil1. Make sure engine is level and the area around oil fill cap is clean.2. Remove oil fill cap.3. Oil should be near the top of the oil fill cap threads, almost to thepoint of overflowingChange Engine Oil• Only use high quality detergent oil rated with API serviceclassification SF, SG, or SH. Select the oil’s SAE viscosity gradeaccording to the expected operating temperature. Refer to opera-tion section for viscosity chart.• Change engine oil after the first five to eight hours of operation,and every fifty hours or every season thereafter. Change oil everytwenty five hours when operating engine under heavy load or inhigh temperatures.To Drain Oil1. Run the engine to warm the oil.2. With engine OFF but still warm, disconnect the spark plug wireand keep it away from spark plug.3. Remove oil drain cap located at the base of the engine, and drainoil into an appropriate receptacle. See Figure 13.CAUTIONUsed oil is a hazardous waste product. Dispose of used oil properly.Do not discard with household waste. Check with your local authori-ties or Sears Service Center for safe disposal/recycling facilities.4. When engine is drained of all oil, replace and tighten the oil draincap.5. With the engine level, refill with approximately 28 oz. of fresh oil.Fill the oil up into the threads of the oil fill plug, almost to the pointof overflowing.6. Replace the oil fill plug and wipe up any oil that may have spilledor overflowed.7. Replace spark plug wire before starting.CAUTIONDo not use pressurized air or solvents to clean the air cleanercartridge.Figure 13End CapOil DrainFigure 12CoverAir Filter