The manufacturer’s of residential grade saws (ie, “disposable” saws) aren’t likely to document what the stock screw turns-out are, or even sell you the tool. So I searched google for info from experienced users/techs. Based on my reading the stock setting is 2 turns out on both the High and Low, and adjust as needed. BOOM! that was it! Roared to life and I got it dialed in from there.
During my time lost in the tuning wilderness I figured it was time to mark the tool:
That little silver dot on the handle of the carb tool is made with a Sharpie Metallic. A friend at work said how well they work for marking black plastic and WOW does it make a difference. First thing I do when buying anything with an adapter or wall war is mark it with the name of the device it belongs to. Where has this been all my life.