In article , Bob Hobden
writes


The flywheel is normally on a tapered shaft with a key so tapping it gently
around the edge with a wooden or leather mallet should loosen it once you
have loosened the nut (don't take it off or you could damage/break the
flywheel as it hits the ground!) and don't lose the key.
Something else whilst behind the flywheel, the ignition is usually activated
by a pushrod working on a cam and sometimes this pushrod gets stuck (rusted)
in the up position, so make sure it's free and working OK.

And if you've gone that far it would be a good idea to clean the points
and check the gap.

Roy.
--
Roy Bailey
West Berkshire.