Unfortunately no, got nothing on this. Was given to my father, 80 now, a year or two ago? By an old timer, HIS standards!
I haven’t even removed the cowl yet.
Noticed that spring and discovered a third pull wire and what seems improvised throttle with a possibly (even likely) home brewed butterfly plate in the Venturi.
Thanks for the replies. I’ll post more pics as I get into it a little.
While not installed in the photo, I have the other gear leg, has operating struts!