While you wait for answers, we may have found some information which could help you.
Click here for Where New BladeThe engine on my mower will not shut off?
McCulloch 3540P spark plug fowling?
how to change the blade McCulloch 3540p?
Mcculloch ML857 Lawnmower?
mcculloch only runs 5 seconds?
engine cutting out mcculloch lawn mac 3540p?