some of those junk Bogus and Stratton engines had a form of automatic choke.
It was basically a spring loaded flapper that opened when air flow
increased.

s


"Jerry" wrote in message ...
I just started using a Craftsman II "30ne Plus" lawn mower, which was made
roughly a dozen years ago.

There is no control lever/cable for choke or throttle. There is a lever on
the body, for throttle. Near to that is some device: it has a soft black
rubber covering which is hollow, and shaped approximately like a 1"
inverted cup. There is a small hole in it. I can depress/collapse it, but
not pull it. Is that rubber thing related to a choke? If so, can it be
set, or is it somehow automatic?

Or is choking accomplished merely by setting the throttle lever to the
minimum position? If so, what's that black rubber thing for? Thanks.