SUGGESTED PROPELLER SIZES

STARTING
 PROP

ENGINE SIZE

5.25x4; 5.5x4; 6x3.5; 6x4; 7x3

6x3

.049

7x3; 7x4.5; 7x5

7x4

.09

8x5; 8x6; 9x4

8x4

.15

8x5; 8x6; 9x5

9x4

.19 - .25

9x7; 9.5x6; 10x5

9x6

.20 - .30

9x7; 10x5; 11x4

10x6

.35 - .36

9x8; 11x5

10x6

.40

10x6; 11x5; 11x6; 12x4

10x7

.45

10x8; 11x7; 12x4; 12x5

11x6

.50 - .51

11x7.5; 11x7.75; 11x8; 12x6

11x7

.60 - .61

11x8;12x8; 13x6; 14x4

12x6

.70

12x8; 14x4; 14x5

13x6

.78 - .80

13x8; `15x6; 16x5

14x6

..90 - .91

515x8; 18x5

16x6

1.08

16x10; 18x5; 18x6

16x8

1.20

18x8; 20x6

18x6

1.50

18x10; 20x6; 20x8; 22x6

18x8

1.80

18x10; 20x6; 20x10; 22x6

20x8

2.00

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SUGGESTED PROPELLER SIZES

STARTING
PROP

ENGINE SIZE

9x5,10x5

9x6

.20 - .21

10x6,10x7,11x4,11x5.11x7,11x7.5,12x4,12x5

11x6

.40

10x6,10x7,10x8,11x7,11x7.5,12x4,12x5,12x6

11x6

.45 - .48

11x7.5,11x7.75,11x8,12x8,13x5,13x6,14x5,14x6

12x6

.60 - .65

12x8,13x8,14x4,14x6

13x6

.80

13x6,14x8,15x6,16x6

14x6

.90

14x8,15x6,15x8,16x8,17x6,18x5,18x6

16x6

1.20

15x6,15x8,16x8,18x6,18x8,20x6

18x6

1.60

18x12,20x8,20x10

18x10

2.40

18x10,18x12,20x10

20x8

2.70

18x12,20x10

20x10

3.00

.049 cu. in.

=

0.8 cc

.61 cu. in.

=

10.0 cc

.09 cu. in.

=

1.5 cc

.80 cu. in.

=

13.0 cc

.15 cu. in.

=

2.5 cc

.91 cu. in.

=

14.9 cc

.19 cu. in.

=

3.1 cc

1.20 cu. in.

=

20.0 cc

.21 cu. in.

=

3.5 cc

1.50 cu. in.

=

25.0 cc

.25 cu. in.

=

4.1 cc

1.60 cu. in.

=

26.2 cc

.29 cu. in.

=

4.8 cc

1.80 cu. in.

=

30.0 cc

.35 cu. in.

=

5.7 cc

2.00 cu. in.

=

32.8 cc

.40 cu. in.

=

6.5 cc

2.40 cu. in.

=

39.3 cc

.46 cu. in.

=

7.5 cc

2.70 cu. in.

=

44.3 cc

.50 cu. in.

=

8.2 cc

3.00 cu. in.

=

49.2 cc

(conversion factors: 1 cu in. =  16.3934 cc or .061cu. in.  = 1 cc)

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