Propellor Selection Chart

2-Stroke Engine

ENGINE SIZE	PREFERRED SIZE	ALTERNATE SIZE
.049	6 x 3	5 1/4 x 4, 5 1/2 x 4, 6 x 3 1/2, 6 x 4, 7 x 3
.09	7 x 4	7 x 3, 7 x 4 1/2, 7 x 5
.15	8 x 4	8 x 5, 8 x 6, 9 x 4
.19 - .25	9 x 4	8 x 5, 8 x 6, 9 x 5
.29 - 30	9 x 6	9 1/2 x 6, 10 x 5
.40	10 x 6	9 x 8, 11 x 5
.45	10 x 7	10 x 6, 11 x 5, 11 x 6, 12 x 4
.50	11 x 6	10 x 8, 11 x 7, 12 x 4, 12 x 5
.60 - .61	11 x 7	11 x 7 1/2, 11 x 7 3/4, 11 x 8, 12 x 6
.70	12 x 6	11 x 8, 12 x 8, 13 x 6, 14 x 4
.78 - .80	13 x 6	12 x 8, 14 x 4, 14 x 5
.90 - .91	14 x 6	13 x 8, 15 x 6, 16 x 5
1.20	16 x 6	16 x 10, 18 x 5, 18 x 6
1.50	18 x 6	18 x 8, 20 x 6
1.80	18 x 8	18 x 10, 20 x 6

4-Stroke Engine

ENGINE SIZE	PREFERRED SIZE	ALTERNATE SIZE
.20 - .21	9 x 6	9 x 5, 10 x 5
.40	11 x 6	10 x 6, 10 x 7, 11 x 4, 11 x 5, 11 x 7, 11 x 7 1/2, 12 x 4
.45 - .48	11 x 6	10 x 6, 10 x 7, 11 x 7, 11 x 7 1/2, 12 x 4, 12 x 5, 12 x 6
.60 - .65	12 x 6	11 x 7 1/2, 11 x 7 3/4, 11 x 8, 12 x 8, 13 x 5, 13 x 6
.70	12 x 6	11 x 7 1/2, 11 x 7 3/4, 11 x 8, 12 x 8, 13 x 5, 13 x 6
.80	13 x 6	12 x 8, 13 x 8, 14 x 4, 14 x 6
.90	14 x 6	12 x 10, 13 x 8, 14 x 8, 15 x 6
1.08	16 x 6	15 x 8, 18 x 5
1.20	16 x 6	14 x 8, 15 x 6, 15 x 8, 16 x 8, 17 x 6, 18 x 5, 18 x 6
1.60	16 x 6	15 x 6, 15 x 8, 16 x 8, 18 x 6, 18 x 8, 20 x 6
2.40	18 x 10	18 x 12, 20 x 8, 20 x 10
2.70	20 x 8	18 x 10, 20 x 8, 20 x 10
3.00	20 x 10	18 x 12, 20 x 10