RE: Evolution 61 NT
Straight from the Master Airscrew technical bulletin on props:
2-Stroke Engines
.049 - .051 = 5.5x4, 5.5x4.5, 6x3, 6x3.5, 6x4
.09 - .10 = 7x3, 7x4, 7x5, 7x6
.15 = 7x6, 8x3, 8x4, 8x5, 8x6, 8x7
.20 - .25 = 8x6, 8x7, 9x4, 9x5
.29 - .35 = 9x6, 9x7, 9x8, 9.5x6, 10x4, 10x5, 10x6
.40 = 9.5x6, 10x4, 10x5, 10x6, 10x7, 10x8, 10x9
.45 - .50 = 10x7, 10x8, 11x4, 11x5, 11x6, 11x7, 11x7.5
.60 = 11x5, 11x6, 11x7, 11x7.5, 11x8, 11x9, 11x10
.71 - .80 = 12x6, 12x8, 13x6, 13x8, 13x10, 14x8
.90 = 13x6, 13x8, 13x10, 14x6, 14x8
As you can see, there is a fair variety to select from. Don't be afraid to experiment within reason. You will be able to tell fairly quickly what works for you . Good luck.