Did you have any luck with finding pictures to install the choke return spring? I'm having problems getting it installed on my mower, same model. Can't seem to find pics of how it installs.

try the lawn mower forum
Install the spring in such a manner as it works as designed, in the meantime....a little engineering.

Earthworm, This IS the lawnmower forum.

Tractor forum would be the one you probably meant??
That's the one I'd recommend---