I have a 2000 year model tiller handle 25hp Yamaha that has no external choke. It has an electrical part on the carb. Does anyone know procedure to choke. f25EASY model
There is no procedure. It is an automatic device. Adds extra gasoline only when the motor is cold to help get it started.
Now there will be a starting procedure in the owners manual. Some motors need the throttle opened a bit and some don't. You can experiment to see what works better for your specific motor.
being a F motor I would try moving the throttle back and forth a few times before hitting the start to see if it has an accelerator pump type of device in the carbs tp throw a little extra fuel for atart up.
or look in the parts break down to see if it has that