Murray 40319x51B Parts Manual

Ensure the tractor is on a flat surface. Sit on the seat, insert the key into the ignition, and turn it to the 'Start' position while pressing the brake pedal. Release the key once the engine starts.
Check the battery connections and ensure they are tight. Inspect the fuel level and confirm the fuel valve is open. Verify that the seat safety switch is engaged.
The oil should be changed every 50 hours of operation or at the start of each mowing season, whichever comes first.
Use SAE 30 oil for general use. Refer to the operator's manual for temperature-specific recommendations.
Check that the tire pressure is even on all sides. Ensure the mower deck is level. Inspect the blades for sharpness and damage.
Clean the tractor thoroughly. Change the oil and drain the fuel system. Store in a dry, covered area. Disconnect the battery and charge it monthly.
Locate the height adjustment lever on the side of the tractor. Move the lever to your desired cutting height position. Make sure both sides are set equally.
Check the oil level, tire pressure, and fuel level. Inspect the blades and mower deck for any debris or damage. Ensure all safety features are operational.
Ensure the tractor is off and the spark plug wire is disconnected. Lift the mower deck and secure it. Use a wrench to remove the blade bolt, replace the blade, and tighten the bolt securely.
Check for any debris lodged in the mower deck. Inspect the blades for damage or imbalance. Ensure all bolts and screws are tightened properly.