Stihl makes some of the best two stroke small engine machines in the world. Everything from leaf blowers to chainsaws to string trimmers. The best tip I ever got to nirvana when it comes to getting those small machines started is really simple.
Close the choke. Turn on switch. Do not touch throttle. Pull start cord. Should only take once or twice before it "hits." By that I mean it almost fires but doesn't. Open choke. Pull cord and it should start on the first or second try. Works for me EVERY SINGLE TIME. If you leave the choke closed, you will flood the carb and it won't start until you let it sit for a while. But follow those steps exactly and you'll be in two stroke nirvana, too. Probably works for other brands, but why would you buy another brand?!?
Many engines require the choke to be closed until it's completely started and warms up some. Not so with the Stihl. Just use it to get fuel to the carb, then open it up and it'll fire with no choke. And they just run forever if you keep a proper fuel mix in them.
This post is dedicated to Alisa, leaf blower lover.