If you leave the choke on after the motor fires even a little, you can easily flood it making it difficult to start.
This is really useful info… the Solo motors are easy to start if you keep this in mind. If you don’t and try to start a Solo motor like an old Techumseh motor… you can have a heck of a time. I’d mention that this info can be found in the owner’s manual but we all know guys don’t read instructions, myself included.