I have been wanting adjust the carb on my Echo blower for some time now. It runs great when it's below 70 out, and has not been out in the sun. But if it's out in the sun, it takes a long time to warm up before it will take any throttle. I've read on here from quite a few people that this is a common problem on almost all Echo's, and adjusting the high and low speed needles would solve it. I looked up the Illustrated Parts List and it showed no adjustments for my particular carb (Walbro WYK-180). But, it took it off this evening, and found two brass plugs apparently hiding the adjustment screws. But my question is, does anyone know how to get these plugs out? And secondly, which plug is the high speed needle, and which is the low speed needle? Attached are the photos I got of the two brass plugs. The first pic is of the flat side of the carb, the side up against the intake. The second one shows both plugs, the one on the back side of the carb, and the one that faces the intake. Any advice on how to do this would be greatly appreciated.