For the very basics. On the B206 there are two different fuel controls. One is Bendix, the other Seko? Procedures for starting are day and night. Bendix you run to 15% then "crack" it to the idle stop, all the time making sure that the Temp does not go through the roof. The other is a "Modulated" start in that when it gets to about 12-15% you "crack" barely and introduce fuel. You continue to slowly add throttle until at the Idle stop, all the time monitoring the temp. If you do to a Seko as is done with a Bendix you will see the Temp guage rap itself around a couple times and your tailboom will probably melt itself off.
Same thing in the B206L series. Modulated starts are the norm......
Now someone can come in and be so very technical and clean up my post...