I was give a new in the box Enya .29 engine. It was purchased in 1962 for $21.50.

1. Is this a ringed engine?
2. Is this a ball baring engine?
3. There is no back plate to remove, the front of the engine can
be removed from the crankcase.
4. Do I need to be careful when removing the front from the crankcase?
5. What is the bolt between the crankcase and the prop hub on the bottom side for?[/color]

Any general information you want to add would be great.