If it is running rich, why not lean it out? 1 turn out is a good baseline for saws so it being too rich at 1.25 isn’t really odd. Another thing you could check is your metering lever/pop off pressure isn’t set too high. Lastly, check your pop off pressure. If it’s too low the saw will start dumping fuel in too early, you’ll want it to be around 15lbs or so. To test your pop off pressure, just hook a pressure gauge to where the fuel line goes on the carb and pump it until it “pops” and starts losing pressure.