While you wait for answers, we may have found some information which could help you.
Click here for Chainsaw Runs Chokehow to start mcculloch 738 chainsaw?
where can i find a mcculloch service manual/parts book for a power mac 738?
McCulloch 438 Chainsaw Probs?
my mcculloch chainsaw won't start?
I Have a pro mac 610 w/elec.ign. has spark wont start?
saw wont keep runing?