Points need cleaning (at least). Some models have a plate in the flywheel you can remove, others require removal of the flywheel to access. That will most likely fix it. If your coil is duff, for a machine of this age you will struggle to find a replacement. You may have to resort to a coil and battery conversion.
phil_saunders(a)bigfoot.com
Phil Saunders
September 2012
I can answer this question...
how can i get a spark on my ransomes marquis 5m lawnmower?
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Try fixfault.com to fix lawn mowers.