Poulan Pro PD20H42STA Operator's Manual

Ensure the parking brake is engaged, set the throttle lever to the 'Fast' position, and turn the ignition key to start the engine.
Check the fuel level, ensure the battery is charged, and inspect the spark plug for signs of wear or damage.
Change the oil every 50 hours of operation or at least once per season.
Remove the blades from the mower deck, secure them in a vice, and use a metal file or grinder to sharpen the cutting edge.
Use unleaded gasoline with an octane rating of at least 87. Avoid using ethanol-blended fuels above E10.
Remove the air filter cover, take out the filter, and gently clean it with compressed air or replace it if it's heavily soiled.
Check for debris stuck in the deck, ensure the blades are balanced, and inspect the spindle bearings for wear.
Use the deck lift lever to raise or lower the mower deck to the desired cutting height.
Clean the tractor, change the oil, remove the battery, and store it in a dry location. Add fuel stabilizer to the gas tank.
Disconnect the spark plug wire, remove the mower deck, and follow the belt routing diagram to replace the drive belt.