Thank you NormK.
That did the trick. Just put a new spark plug into the machine with a dose of "Start Ya Bastard", and it fired.
That was my first thought that the spark plug may be failing under load. Next option was to consider the coil failing under load.
Mower shop only had the slightly cooler NGK CMR6H spark plug instead of the normal NGK CMR5H.
To complete the information I detailed above for the machine, the carburetor is a Walbro WYB-17 and takes a K10-WYB repair kit.
Now just have to wait for new carby kit so it runs on petrol and not ether.
Appreciate your advice.
Regards
Daryl :-)
