Welcome Jim. You’re talking about the SKUSA 175 with the Tillotson carb right?
I have heard reports of the midrange being very abrupt. Some folks have elected to move the cable to a lower point on the throttle pedal, and/or add stronger springs.
Jordon Musser mentioned a similar experience in this video.
I don’t have a lot of 175 experience that I can relay yet, but whenever something comes up with a pump diaphragm carb, my question is… do you know what your pop off is set at?
Another thing to mention, you might know this, but for the benefit of others reading this…
The idle control on the Tilloston supplied with SSE is air control screw. So it works the opposite way of the other two (High and low) screws.
Turning the idle screw in/clockwise will richen the idle mixture
Turning the idle screw counter clockwise/left will richen the idle mixture.