While you wait for answers, we may have found some information which could help you.
Click here for Mcculloch Set ScrewsMcculloch 2818 Runs fine but spool will not spin?
how to change mcculloch sl trim head?
McCulloch MT270X ignition coil?
Fuel Starvation?
2 Stroke strimmer not running?
Where can I buy a strimmer spool spring for my McCulloch MT270X strimmer?