Onan 4.0 BFA genset choke doesn't work

[furnguy]

It appears my automatic choke on my generator is not working. If I turn it clockwise the engine starts and then as it warms up I have to slowly turn it counter clockwise. The unit gets quite hot so I assume the electric heater in it is working. Is the first step to take the face off and see if the bi-metal spring is broken? Are they available anywhere? It is in a '78 Winnebago and the unit is very hard to completely remove.
Thanks for any info.

[DaveVA78Chieftain]

Hopefully this parts manual will help you work through this: http://dave78chieftain.zxq.net/OnanManuals/Onan%20965-0222%20BFA%203.0-4.0%20Parts.pdf

and this service manual
http://www.mediafire.com/?ej95fbb4jfm5j9p

Dave