Murray 385020x51A Parts Manual

To change the oil, first ensure the tractor is on a level surface. Warm up the engine to allow the oil to drain more easily. Turn off the engine and ensure it is cool enough to work on. Locate the oil drain plug underneath the tractor and place an oil pan beneath it. Remove the plug and allow the oil to drain completely. Replace the drain plug securely, then refill the engine with the recommended oil type and quantity specified in the user manual.

First, check the fuel level and ensure there is enough fuel. Verify that the battery is charged and the connections are clean and secure. Check the spark plug for wear or damage and replace if necessary. Ensure the choke is in the correct position for starting. If the tractor still won't start, consult the troubleshooting section of the manual or contact a professional technician.

Before sharpening the blades, disconnect the spark plug wire to prevent accidental starting. Lift the tractor to access the blades safely. Remove the blades using a wrench, taking note of their orientation. Use a file or a bench grinder to sharpen the blade edges, maintaining the original angle. Balance the blades before reinstalling them to ensure even cutting and to prevent vibration.

Regular maintenance includes checking and changing the oil, inspecting and replacing the air filter, checking tire pressure, inspecting belts and blades for wear, lubricating moving parts, and cleaning the tractor after use to prevent buildup of debris. Refer to the user manual for the recommended maintenance schedule.

To adjust the cutting height, locate the height adjustment lever on the tractor. Move the lever to the desired height setting, making sure both sides are set equally if there are separate levers for each side. This ensures an even cut across your lawn. Refer to the manual for guidance on recommended cutting heights for different grass types.

Excessive vibration can be caused by unbalanced or damaged blades. Check the blades for damage and ensure they are balanced. Also, inspect the belts for wear and proper tension. If the problem persists, examine the engine mounts and other moving parts for wear or damage. Consult the manual or a professional if necessary.

Poor cutting performance can be due to dull blades, incorrect deck leveling, or engine issues. Sharpen the blades and ensure they are balanced. Check the deck to ensure it's level and adjust if necessary. Inspect the engine for any performance issues and ensure it's running smoothly.

Use unleaded gasoline with an octane rating of 87 or higher. Avoid using gasoline with more than 10% ethanol content as it can cause engine issues. Always use fresh fuel and store it properly to prevent contamination and degradation.

To clean the deck, first ensure the engine is off and cool. Use a garden hose or pressure washer to remove grass clippings and debris from the underside of the deck. Scrape off any stubborn buildup using a putty knife. Ensure the deck is dry before storing the tractor to prevent rust.

The spark plug should generally be inspected and cleaned every season and replaced every 100 hours of operation or annually, whichever comes first. Check the manual for specific recommendations for your model.