A twist top off a Coke bottle is just the right size to slip over the push button on the starter switch. It's a band-aid fix, but it works. Check the pivot points in the pedal linkage for wear- - - -you'll probably find some oval holes and worn linkage. Also look for worn out brushes or a burned spot on one of the armature commutator bars. If it stops in the wrong place, the brushes won't make contact until the armature gets moved a little.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!