RE: OS 1.60 Diesel Conversion???
They only need to be a little leaner than the glow settings and a prop of about 30% more load, I use 50% more in some cases. Your 1.60 should turn a 16x8 three blade in the 9,100 to 9,500 rpm range with the carb about 75% open. You can also use a smaller volume muffler. It may turn a 16x10 three blade the well too.