Husqvarna 968999657 Operator's Manual page 78

Action
100-Hour Service
1. Perform the 25-hour service.
2. Perform the 50-hour service.
3. Change the engine oil filter.
4. Clean/replace the spark plugs.
5. Replace the fuel filter.
6. Clean the cooling fins on the engine and transmission.
7. Check V-belts.
8. Check tighten caster wheel axle bolts (every 200 hours).
9. Change the air filter's paper cartridge.
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English
SERVICE JOURNAL
Date, mtr reading, stamp, sign