Ralph had a good preliminary suggestion.
If this doesn't work.....
Remove the bendix/cc vent housing and remove the nuts holding the starter. As you pull the starter out,
rock the bendix end upward and you should be able to complete the removal.
Any decent starter/generator shop can o/h this unit. Polish or cut the armature, new brushes and bearings. The parts book in auto parts stores used to have listings for Franklin engines!
Dan