Prop Guide for IC Engines

 

TWO STROKE PROP CHART

 

Engine (cu. in.) / Propeller selection

.049 / 5.25 x 4; 5.5 x 4; 6 x 3.5; 6 x 4; 7 x 3

.09 / 7 x 3; 7 x 4.5; 7 x 5

.15 / 8 x 5; 8 x 6; 9 x 4

.19 - .25 / 8 x 5; 8 x 6; 9 x 5

.29 - .30 / 9 x 7; 9.5 x 6; 10 x 5

.35 - .36 / 9 x 7; 10 x 5; 11 x 4

.40 / 9 x 8; 11 x 5

.46 / 10 x 6; 10 x 7; 11 x 5; 11 x 6; 11 x 7; 12 x 4

.50 / 10 x 7; 10 x 8; 11 x 7; 12 x 4; 12 x 5

.60 - .61 / 11 x 7.5; 11 x 7.75; 11 x 8; 12 x 6

.70 / 11 x 8; 12 x 8; 13 x 6; 14 x 4

.90 - .91 / 13 x 8; 15 x 6; 16 x 5 1.08 15 x 8; 18 x 5

1.20 / 16 x 10; 18 x 5; 18 x 6

1.50 / 18 x 8; 20 x 6

1.80 / 18 x 10; 20 x 6; 20 x 8; 22 x 6

 

FOUR STROKE PROP CHART

 

Engine (cu. in.) / Propeller selection

.20 - .21 / 9 x 5; 10 x 5

.40 / 10 x 6; 10 x 7; 11 x 4; 11 x 5; 11 x 7; 11 x 7.5; 12 x 4; 12 x5

.45 - .48 / 10 x 6; 10 x 7; 10 x 8; 11 x 7; 11 x 7.5; 12 x 4; 12 x 5; 12 x 6

.60 - .65 / 11 x 7.5; 11 x 7.75; 11 x 8; 12 x 8; 13 x 5; 13 x 6; 14 x 5;14x6

.80 / 12 x 8; 13 x 8; 14 x 4; 14 x 6

.90 / 13 x 6; 14 x 8; 15 x 6; 16 x 6

1.20 / 14 x 8; 15 x 6; 15 x 8; 16 x 8; 17 x 6; 18 x 5; 18 x 6

1.60 / 15 x 6; 15 x 8; 16 x 8; 18 x 6; 18 x 8; 20 x 6

2.40 / 18 x 12; 20 x 8; 20 x 10

2.70 / 18 x 10; 18 x 12; 20 x 10

3.00 / 18 x 12; 20 x 10