Craftsman 917.204130 Operator's Manual page 39

Action Date, mtrreading, stamp, sign
At Least Once Each Year
Clean the engine's cooling air intake (25 hours)
Replace the air cleaner's foam pre-filter (300 hours)
Replace the air filter's paper cartridge
Change the engine oil (50 hours)
Replace the engine oil filter (100 hours)
Check/adjust the cutting height
Check/adjust the park brake (50 hours)
Clean/Change the spark plugs (100 hours)
Change the fuel filter (100 hours)
Check the engine valve clearance
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