Simplicity 990129 FC Parts Manual

Ensure the tractor is in neutral, engage the parking brake, and turn the ignition key to start the engine.
Check the battery connections, ensure the fuel tank is not empty, and verify that the spark plug is functioning.
Change the oil every 50 hours of operation or at the start of each season, whichever comes first.
Use SAE 30 oil for temperatures above 32°F (0°C) and SAE 5W-30 oil for temperatures below 32°F (0°C).
Check for bent blades, ensure the deck is level, and make sure the tire pressures are even.
Conduct a general inspection before each use, change oil every 50 hours, replace air filter annually, and check belts and blades monthly.
Use the height adjustment lever located near the operator's seat to set the desired cutting height.
Inspect for debris buildup on the blades, check for loose components, and ensure that the blades are properly balanced.
Clean the tractor, remove fuel or add a fuel stabilizer, and store the battery in a cool, dry place.
Check the transmission fluid level, inspect the drive belt for wear, and ensure the transmission linkage is not damaged.