Perhaps, choke is not marked exclusively, as it is just at the highest point on the throttle. I know other models specifically indicate and label the choke setting on the throttle adjustment. There is a notch somewhere in the middle indicating the blades will not turn on unless the throttle is set to that point. As I increase from there however, I don't notice any change in the blade speed (of course I am relying on sound at this point). Maybe that is the sweet spot that Ariens intends for it to be set as the cutting speed. It can be increased from there, but once I get ever so close to full throttle, it will shut off.
