'29 to '31 starter motor type?

[Charles P]

On the subject of starter motors, many of the books indicate that they are robust enough to be used as 12 volt, as well as the 6 volt originally installed. Does anyone have serious reservations about this?

I used mine on 12volts for years. It did get through brushes fairly regularly but since the engine is pressure fed I insist on turning the engine over on the starter until I get at least 10 pounds on the gauge. I figure that way No 4 big end stands a better chance of being adequately lubricated. 

C