McCulloch M51–550CMD Spare Parts List
![McCulloch M51–550CMD manual cover](/images/eHaJvphdTAjoMrpxdDhDaYlN/thumbs/thumb175x175.webp)
To start the McCulloch M51–550CMD Lawn Mower, ensure that the fuel tank is filled and the oil level is adequate. Pull the safety lever to the handlebar and then pull the starter rope briskly until the engine starts.
If the mower won't start, check the fuel level, ensure the spark plug is connected, and inspect the air filter for blockages. Also, make sure the safety lever is engaged while starting.
It is recommended to sharpen the blades every 20-25 hours of use or at the beginning of each mowing season to maintain optimal cutting performance.
Use SAE 30 oil for temperatures above 40°F (4°C) and SAE 10W-30 for temperatures below 40°F (4°C). Always check the manufacturer's manual for the most accurate information.
To clean the deck, ensure the mower is off and remove the spark plug for safety. Use a brush or hose to remove grass clippings and debris from the underside of the deck.
Excessive vibration can be caused by an unbalanced blade, loose components, or engine issues. Check the blade for damage, ensure it's properly secured, and tighten any loose parts.
To change the spark plug, disconnect the spark plug wire, remove the old spark plug using a spark plug socket, and install a new one. Ensure it is properly gapped and secure the wire back in place.
Regular maintenance includes checking oil levels before each use, cleaning the air filter every 25 hours, changing the oil every 50 hours, and inspecting the blades for sharpness regularly.
Before storage, run the engine until it stops to clear the fuel system, change the oil, clean the mower, and store it in a dry place. Disconnect the spark plug to prevent accidental starts.
Uneven cutting can be caused by a dull blade, incorrect wheel height settings, or an unbalanced mower deck. Sharpen or replace the blade, check the wheel height, and ensure the deck is level.