Toro 48-cm 20920 Operator's Manual

Ensure the mower is on a flat surface, the blade control bar is disengaged, and the fuel valve is open. Pull the starter handle firmly to start the engine.
Check the fuel level, ensure the spark plug is connected, and verify the air filter is clean. If problems persist, consult the user manual or contact a professional.
Change the oil after the first 5 hours of use, then every 25 hours or once per mowing season. Use SAE 30 oil for optimal performance.
Check and clean the air filter every 25 hours of operation. Replace it if it appears damaged or excessively dirty.
Disconnect the spark plug wire, remove the blade, and sharpen it using a file or grinder. Ensure the blade is balanced before reinstalling.
Check the tire pressure and ensure the blade is sharp and properly balanced. Make sure the deck is not obstructed by debris.
After ensuring the engine is off and cool, tilt the mower carefully and use a hose to wash away grass clippings and debris. Avoid using excessive water pressure.
Check for debris on the blade or under the deck, ensure the blade is balanced, and inspect the engine mounts for damage.
Locate the height adjustment lever on each wheel and move it to the desired setting. Ensure all wheels are set to the same height for an even cut.
Use unleaded gasoline with an octane rating of 87 or higher. Avoid using gasoline with more than 10% ethanol to prevent engine damage.