You already have, the flo-jet carb mechanism is unusual. I will put up a couple of pics from the B & S workshop manual, but the one showing the top of the L shaped rod is for the fixed speed (generator) engine. for those with throttle cables the top (compression) spring is longer and lighter, and the knurled nut isn't knurled, but has a split pin through it and the rod. The split pin holds the top of this spring in place.