Hi Norm,
When they run one minute then won't start for me usually it's one of the following ,spark plug ,coil ,kill switch wire earthing,
sometimes the fuel hose perishes on the inside and drops small particles of rubber that blocks the carby or the choke / throttle
linkage fails to work correctly. Occasionally a bolt or bolts etc can come loose stopping it running like when the flywheel nut
is loose and the key breaks throwing out the timing.
Cheers
Max.
