I've been hitting the pawnshops again and found some nice looking Stihls. The girl even let me try one but I couldn't get it to start. On the side there's the ports for gas/oil mixture and chainsaw oil. On the back there's a three-position switch on the lefthand side. It appears to be off, run and high-idle. You have to hold down the trigger to get it to the bottom position. My problem is, on the back of the hump on top, there's a dial that goes from 45 degrees left to 45 degrees right. I'm assuming that's choke, but I don't know where to set it for starting position. I also couldn't find a primer pump. OK, so how do I start the ???? thing?