Looks like I found another spring on the left side of the bell housing.
I never knew there was a spring in that location.
I'm not to sure how it is attached to the starting pedal shaft/rod assembly.
But it must help to return the starting pedal shaft/rod back to the non-starting position. Update: Read this POST #1289335 below.
Could be a factor as to why the starting pedal is getting stuck in starting position.
It is not a normal type of Spring. Not sure of its correct type of name.

Check attached photos
Mechanical Starter Control illustration.

Tip, right click on photo and select "open link in new tab"

xfiles
Attachments
starter control linkage instruction.jpg (172.49 KB, 262 downloads)
starter control linkage.jpg (104.44 KB, 182 downloads)