Murray 312000x98A Parts Manual

Ensure the tractor is on a level surface, the parking brake is engaged, and the blade engagement lever is in the 'off' position. Insert the key and turn it to the 'start' position while pressing the brake pedal. Release the key once the engine starts.
It is recommended to use SAE 30 motor oil for temperatures above 32°F (0°C) and SAE 5W-30 for colder temperatures. Always check the owner's manual for specific oil recommendations.
Check the battery connections for corrosion and ensure they are tight. Verify that the fuel level is adequate and that the fuel is fresh. Inspect the spark plug for wear or damage and replace if necessary.
Change the oil after the first 5 hours of operation and then every 50 hours or annually, whichever comes first. Regular oil changes ensure optimal performance and longevity of the engine.
Check the blade engagement cable for any signs of wear or damage. Ensure the belt is properly positioned and not broken. If the cable or belt is damaged, it may need to be replaced.
Locate the cutting height adjustment lever on the left side of the tractor. Move the lever to the desired height position, ensuring it is securely in place before operating the tractor.
Clean the tractor thoroughly to remove grass and debris. Change the oil and remove the battery, storing it in a cool, dry place. Add a fuel stabilizer to the gas tank and run the engine for a few minutes to circulate the stabilizer.
Regular maintenance is key to fuel efficiency. Ensure the air filter is clean, the spark plug is in good condition, and the tires are properly inflated. Adjust cutting speed and height according to lawn conditions.
Excessive vibration can be caused by unbalanced blades or debris lodged in the mower deck. Ensure the blades are balanced and securely attached. Clean the deck thoroughly to remove any stuck debris.
First, disconnect the spark plug wire to prevent accidental starting. Remove the mower deck and the cutting belt. Follow the owner's manual to properly route the new drive belt and reattach the deck. Ensure all components are secure before reconnecting the spark plug.