A six volt starter will turn the engine over faster than a 12 volt starter believe it or not. If the bearings and brushes are in good shape, they work fine last long time.
I drove my 3100 all the way across a level parking lot with the key off. I mashed the stomp starter, let the clutch out gingerly in first gear and off I went. I couldn't go fast enough to shift into second before I ran out of parking lot. Starter survived just fine.
