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VELVET DRIVE
71 & 72 INLINE MARINE TRANSMISSIONS |
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We carry a wide selection
of reduction ratios to suit your particular needs.
Proven, reliable cast iron
design. |
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The "71" and "72"
designations of Borg-Warner marine transmissions indicate
input horsepower ranges.
There are 3
basic models of transmissions; each with offerings in the 71
and 72 ratings. The most popular model is the In-Line unit.
"In-Line" indicates that the input and output shafts of the
transmission are on the same plane.
Direct drive
versions of the in-line models are frequently used on high
horsepower, light weight boats while the reduction ratio
versions use an additional planetary gear set to allow the
use of larger propellers for greater pulling power at lower
speeds. |
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Dimensions
For 71C (10-17) & 72C (10-18) In-Line Models |
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Inches
(millimeters) |
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Model |
A |
B |
C* |
DØ |
EØ |
FØ** |
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71C
(10-17) |
5.63 (143.00) |
5.69 (144.53) |
16.89
(429.01) |
2.50 (63.50) |
4.25 (107.95) |
5.00 (127.00) |
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72C
(10-18) |
5.63 (143.00) |
5.69 (144.53) |
17.79
(451.86) |
2.50 (63.50) |
4.25 (107.95) |
5.00 (127.00) |
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Note for "C" dimension - direct drive units:
71C
(10-17) 10.50 in. (266.70mm)
72C (10-18) 11.44 in. (290.58mm) |
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**Direct
drive model 71 (only) uses 4 in. (101.60mm)
coupling. |
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General
Information for Model 71C (10-17) |
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Ratings:
Gasoline |
up to 310
HP @ 4200 RPM |
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Ratings:
Diesel |
up
to 182 HP @ 3200 RPM |
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Available
Ratios: |
1.00,
1.52, 1.91*, 2.10, 2.57, 2.91:1.00 |
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Shaft
Rotation |
output
same as engine unless noted by asterisk (*) |
Approximate
Dry Weight
(direct drive): |
95
lb. (43.1 kg.) |
Approximate
Dry Weight
(reduction) |
145
lb. (65.8 kg.) |
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General
Information for Model 72C (10-18) |
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Ratings:
Gasoline |
up to 475
HP @ 4200 RPM |
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Ratings:
Diesel |
up
to 274 HP @ 3200 RPM |
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Available
Ratios |
1.00,
1.52, 1.91*, 2.10, 2.57, 2.91:1.00 |
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Shaft
Rotation |
output
same as engine unless noted by asterisk (*) |
Approximate
Dry Weight
(direct drive): |
109
lb. (49.4 kg.) |
Approximate
Dry Weight
(reduction) |
153
lb. (69.4 kg.) |
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Models 71 & 72
Specification Downloads |
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Please be sure to visit our
Used & Surplus
page for great
prices on Velvet Drive Marine Transmissions. |
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