Couple observations based on 6 years YS ownership,,,,
The reason most people run initially with a glow is for running in purposes.
All the symptoms above are fuel (ie lack) related. either open the main needle more
and/or check the clunk in the tank.
Xman's tip above with the servo disc is a cracker as is using a cut down sanding disc
or piece of liteply cut into a disc, Either that or welcome to the world of YS propdriver
replacement
Doubtless some of the guys here will read the following and think "I've never" etc etc
but again based on years and lots of use, get used to tightening your prop nuts at
least every 30 or so runs as a precaution.
PS
If you can always splash out a few pennies more and buy YS fuel tube.
