I am 25 miles north of Atlanta. It's hot & Humid. Compared to my 2000 Kodiak the stating procedure of the 650 leaves little to be desired. On the Kodiak I just move the choke half way and BAM I get a high-ish idle start up.
The Choke on MY P650 is usless for starting. If I try to use it, it makes things worse. I have to turn it over with a little throttle. It will sputter and if it stalls and I restart it I get a loud TAPing or Clacking from the engine area for a moment or two. I can rid of it by a little throttle bump. What's that?
How do your P650's start up?

 

You probably wont believe this but my P650 will start a lot easier with the pull rope than with the button. Im serious, it starts everytime on 2 pulls or less. No throttle or choke. Try it.

 

the electric starter works fine on mine it has started the first push of the button 98% of the time. its not so bad in the summer but in the winter it takes a good 3-4 min. of warming it up before it will idle correctly