Hello Grumpy,

Thanks for the reply, the drive nut Item 45 is the one I need to remove. I have removed the screws Items 31,32,33 which hold the recoil assy onto the engine crankcase. The recoil assy to slide off the end of the crankshaft in one piece if nut 45 was not there. The drive nut 45 appears to be threaded onto the end of the shaft(??). I have tried hold the shaft with small vice grips (only ones I can get on shaft due to access) and applying both left and right hand pressure in case the thread is LH thread and it does not budge.
I have looked on Outdoorking online store and it does not appear. I found overseas suppliers of the ignition module in USA and UK, I will try get a quote from them after I get the drive nut off, bit pointless until then.

Cheers and thanks for the assistance, Keith.