My choke knob does not have a friction/lock to stay open.
I like to have my hands as free as possible to respond to any issue that may arise during engine start.
In my installation, I have found that two clothes pegs, placed on the choke knob shaft, holding the choke open, before start is initiated, works very well.
Cold Start Sequence:
Master on. Throttle fully closed. Both ignitions on.
Press start button,
Engine starts immediately,
Remove one peg immediately. after start
After engine note /speed changes - remove second peg. Engine speed reduces.
Throttle advanced to maintain 2500 rpm for warm up.
The above all happens within a very few seconds.
Works for me/my engine every time😁
