Murray 42542x6A Parts Manual

To change the oil, first run the engine for a few minutes to warm it up, then turn it off. Place a pan under the oil drain plug and remove the plug. Allow the oil to drain completely. Replace the drain plug and fill the engine with the recommended oil type and amount.
Use unleaded gasoline with an octane rating of 87 or higher. Avoid gasoline with more than 10% ethanol to prevent engine damage.
Check the battery connections to ensure they are clean and secure. Verify that the fuel tank is not empty and the fuel valve is open. Inspect the spark plug for wear or damage and replace it if necessary.
The recommended tire pressure is typically around 10 psi for the front tires and 14 psi for the rear tires. Check the owner's manual to confirm the exact specifications for your model.
Blades should be sharpened at least once per mowing season or more frequently if you notice uneven cutting or damage to the grass. Regular inspection can help determine if sharpening is needed sooner.
Clean the tractor thoroughly to remove grass and debris. Change the oil and filter, and add a fuel stabilizer to a full tank of gas. Disconnect the battery and store it in a cool, dry place. Inflate the tires to the recommended pressure.
Excessive vibration can be caused by unbalanced blades, damaged spindles, or loose mounting bolts. Inspect and balance the blades, check the spindles for damage, and ensure all mounting hardware is tight.
First, disconnect the spark plug and remove the mower deck. Refer to the owner's manual for belt routing. Remove the old belt and install the new one, ensuring it is seated properly on all pulleys. Reattach the mower deck.
Check the air filter every 25 hours of operation or more often in dusty conditions. Clean or replace the filter if it is clogged or damaged to ensure optimal engine performance.
Park the tractor on a flat surface and measure the height of the blade tips from the ground. Adjust the deck height adjustment nuts on each side of the deck to ensure the blade tips are even.