Just to follow up, I found a brass washer that fit and did the job. The remnants of the original looked like denigrated fiber, nylon washers would have worked too. So a clean up, polished the commutator and new brushes and it spins fine. Thanks for all the advice.
I have in the process of repairing this, I have accumulated a plethora of working starters both 6 and 12 volt. Any body want to trade for a glass bowl fuel pump??
