McCulloch MB305 CBS Spare Parts List
![McCulloch MB305 CBS manual cover](/images/GinonYfVBGPKzwmAbABiAWER/thumbs/thumb175x175.webp)
To start the McCulloch MB305 CBS Brushcutter, ensure the power switch is in the "On" position, press the primer bulb several times until fuel is visible, set the choke lever to the "Start" position, and pull the starter rope until the engine fires. Once the engine starts, move the choke to "Run" position.
If the brushcutter doesn't start, check the fuel level, ensure the spark plug is clean and properly gapped, inspect the air filter for blockages, and verify that the carburetor is not clogged. Additionally, confirm that the ignition switch is turned on.
Regular maintenance should be performed after every 25 hours of use or once per season. This includes cleaning or replacing the air filter, checking the spark plug, and inspecting the fuel system for leaks or damage.
Use a fresh unleaded gasoline with a minimum octane rating of 90, mixed with high-quality 2-stroke engine oil at a ratio of 40:1. Avoid using ethanol blends higher than E10.
To replace the trimmer line, turn off the engine and disconnect the spark plug wire. Remove the spool by pressing the tabs on the trimmer head. Cut a length of line, insert it into the spool, and wind it evenly in the direction of the arrows. Reassemble the spool and trimmer head.
Excessive vibration may be caused by unbalanced blades or attachments. Stop the engine and check that all cutting attachments are properly installed and balanced. Inspect for damage and replace any worn or damaged parts.
Remove the air filter cover, take out the filter, and wash it in warm, soapy water. Rinse thoroughly and allow it to dry completely. Apply a small amount of 2-stroke oil to the filter before reinstalling it.
Always wear appropriate protective gear such as safety glasses, ear protection, gloves, and sturdy footwear. Ensure the work area is clear of bystanders and obstacles, and never operate the brushcutter while standing on unstable surfaces.
Adjust the carburetor by locating the idle speed screw. Turn it clockwise to increase the idle speed or counterclockwise to decrease it. Ensure the engine runs smoothly without the cutting head moving at idle. Refer to the manual for detailed instructions.
Decreased cutting performance can result from dull or damaged blades, incorrect trimmer line size, or a clogged air filter. Inspect and replace any worn components, ensure the correct trimmer line is used, and clean or replace the air filter as needed.