Murray 42500D Parts Manual

Ensure the tractor is on a level surface, the parking brake is engaged, and the gear is in neutral. Insert the key and turn it to the start position while pressing the brake pedal.
Use SAE 30 oil for temperatures above 32°F and SAE 5W-30 for colder conditions. Always refer to the owner's manual for specific oil recommendations.
Check the battery connections and ensure they are clean and tight. Verify that there is fuel in the tank and that the fuel valve is open. Inspect the spark plug for wear and replace if necessary.
Regularly check and replace the engine oil, clean or replace the air filter, inspect the blades for sharpness, and ensure that all nuts and bolts are securely tightened.
Ensure the tractor is off and the parking brake is engaged. Use a wrench to remove the blade bolts, replace the blades, and tighten the bolts securely. Always wear gloves for safety.
Check for debris lodged in the mower deck, inspect the blades for damage or imbalance, and ensure that the spindle and other components are not worn out.
Locate the cutting height adjustment lever on the tractor and move it to the desired height setting. Ensure the deck is level by measuring from the ground to the blade tips on both sides.
Check if the transmission is properly engaged and ensure the drive belt is intact. Inspect the hydrostatic transmission fluid levels and refill if necessary.
Maintain regular engine tune-ups, replace the air filter as needed, and ensure the tires are properly inflated. Avoid overloading the tractor and use the recommended fuel grade.
Clean the tractor thoroughly, change the oil, and add a fuel stabilizer to the tank. Store it in a dry, covered location and disconnect the battery to prevent discharge.