Yes, Vision, you got me on that one! The Agility 50 and the 125 are both carburetor models, I believe. I had a 50 and it was really hard to start in cool to cold weather. I would just play with the throttle when the engine gave the first pop. This may be the only answer to that occasional "hard start" question. Anything with a carb will require a special, sequential procedure to start reliably. That "bystarter" autochoke thingy does not seem to work as well as an old fashioned manual choke. I should add that they also seem to be very temperature sensitive like during the cool down stage. There are times between fully up to temp and stone cold that they will start well and others that seem to preclude starting at all.
Karl