Thanks LRT,
I had a look at those threads and they certainly are very detailed but do not quite answer my question.
I think I may have found the problem in that the ignition module resistance certainly seems high (6.55 vs 4.5K)
but some suggest the engine will run at over 5 but not over 6.
I do not have any other ignition modules and I'm a bit reluctant to buy a new one until I am fairly certain.
Any input would be welcome.
All the best
Jeff