Small Engines (Lawn Mowers, etc.): charging system

Question
Craftman riding lawnmower model #917272481 wont charge battery while running?

Answer
Do you have a Kohler engine model #CV492-27506?

Do you have a multimeter to measure DC voltage?

Engine service manual URL:
http://www.kohlerengines.com/onlinecatalog/pdf/tp_2339_d.pdf

Refer to page 8.15 on how to check/test the charging system.

Let me know if the service manual helps.
Eric