4 - 11
50 Hours or Every Season
Change Engine OIl
2
Drain engine oil by opening oil drain petcock. Refer to
Engine Manual for detailed instructions.
Check Fasteners
Check mower blade mounting hardware and all other
fasteners. Replace fasteners that are missing or damaged.
Tighten all nuts and bolts to the correct torque value.
Inspect Muffler and Spark
Arrestor
Replace muffler and (if equipped) spark arrestor if corroded.
Contact your Ariens/Gravely Dealer.
100 Hours or Every
Season
Clean Air Filter Cartridge
1
Clean air filter cartridge. Refer to Engine Manual for detailed
instructions.
Change Oil Filter
Clean oil filter. Refer to Engine Manual for detailed
instructions.
Replace Spark Plug
Replace spark plug. Refer to Engine Manual for detailed
instructions.
Replace Fuel Filter
Replace fuel filter. Refer to Engine Manual for detailed
instructions.
Clean Cooling System
1
Clean cooling system. Refer to Engine Manual for detailed
instructions.
Check All Belts
Replace worn or deteriorated belts.
• Check hydrostatic belt (see
Hydrostatic Belt
Replacement
).
• Check PTO belt (see
PTO Belt Replacement
).
Yearly
Clean/Replace Spark Plugs
Clean/replace spark plugs. Refer to Engine Manual for
detailed instructions.
Clean/Replace Fuel Filter
Clean/replace fuel filter. Refer to Engine Manual for detailed
instructions.
1
Service more often when operating under heavy loads, high temperatures, or dusty conditions. Replace air filter precleaner
and cartridge if very dirty.
2
Change after first 5 to 8 hours of use. Change every 25 hours when operating under heavy loads or in high temperatures.
Interval
Task
Action
