13
• a 13 tooth drive sprocket and 38 tooth steering sprocket if you have a Type 1 rotary
drive
• a 15 tooth drive sprocket and 57 tooth steering sprocket if you have a Type 2 rotary
drive
Figure 3:
Rotary drive sprocket sizes
Note:
The sprocket sizes in Figure 3 provide good steering performance for most boats. If you think
your boat may have unusual steering characteristics, contact Raymarine’s Technical Services Call Center
or an Authorized Service Representative for advice.
Obtaining the steering sprocket
Obtain the appropriate sized
steering sprocket
from the steering system manufacturer.
Obtaining the drive sprocket
Your Raymarine dealer can supply the following
drive sprockets
(suitable for a
3
/
8
inch pitch
chain):
• 13 tooth: part number M81182
• 15 tooth: part number M81183
• 17 tooth: part number M81184
• 19 tooth: part number M81185
• 25 tooth: part number M81186
17
19
25
15
13
17
15
13
17
15
13
15
13
St
ee
rin
g
sp
ro
ck
et
D
riv
e
sp
ro
ck
et
76
76
57
57
57
38
38
38
25
25
25
25
25
1
2
3
4
5
6
1
2
3
4
5
6
7
Number of steering shaft turns (hardover to hardover)
C
ha
in
r
ed
uc
tio
n
ra
tio
Rotary drive - sprocket sizes
Type 1
Type 2
D5083-1
81174_4.book Page 13 Tuesday, October 29, 2013 11:42 AM
