Murray 38711x20C Parts Manual
![Murray 38711x20C Tractor manual cover](/images/JvCCIPyhOsBcSmMeKwhlqFyy/thumbs/thumb175x175.webp)
To change the oil, first warm up the engine, then turn it off. Place a container under the oil drain plug, remove the plug, and let the old oil drain completely. Replace the drain plug and refill with the recommended oil type, checking the oil level with the dipstick.
The Murray 38711x20C Tractor is designed to run on unleaded gasoline with an octane rating of 87 or higher. Avoid using gasoline with more than 10% ethanol content.
If the tractor won't start, check the battery connections for corrosion and ensure they are tight. Verify that there is fresh fuel in the tank and that the fuel shut-off valve is open. Also, check the spark plug for fouling or damage.
Perform oil changes every 50 hours of operation or annually, whichever comes first. Check and replace the air filter every 25 hours and inspect the spark plug annually. Regularly check tire pressure and sharpen blades as needed.
To adjust the cutting height, locate the height adjustment lever near the driver's seat. Move the lever to the desired position, which will raise or lower the mower deck accordingly.
Check if the PTO (Power Take-Off) switch is in the 'On' position. Inspect the drive belt for wear and ensure it is properly tensioned. If issues persist, inspect the PTO clutch and electrical connections.
Remove the air filter and housing to access the carburetor. Detach the fuel line and use carburetor cleaner to spray into the intake. Also, clean the jets and float bowl, then reassemble everything securely.
Clean the tractor thoroughly, change the oil, and stabilize the fuel. Disconnect the battery and store it in a cool, dry place. Cover the tractor to protect it from dust and moisture.
First, disconnect the spark plug. Remove the deck belt from the pulleys, then detach the drive belt. Install the new belt, ensuring it is routed correctly around the pulleys and tensioners. Reconnect the spark plug after reassembly.
Excessive vibration could be due to unbalanced blades, loose components, or worn drive belts. Inspect and balance the blades, tighten any loose parts, and replace worn belts to resolve the issue.