While you wait for answers, we may have found some information which could help you.
Click here for Throttle Cable MccullochFuel Starvation?
How can I replace electric cord on mcculloch air stream electric blower?
mcculoch petrol strimmer sparkplug ?
McCulloch MT270X ignition coil?
how to change mcculloch sl trim head?
Mcculloch 2818 Runs fine but spool will not spin?