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VELVET DRIVE 71 & 72 INLINE MARINE TRANSMISSIONS

 

Velvet Drive 71 & 72 Inline Marine Transmissions
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VELVET DRIVE 71 & 72 INLINE MARINE TRANSMISSIONS

  We carry a wide selection of reduction ratios to suit your particular needs.

  Proven, reliable cast iron design.

   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.


 

Dimensions For 71C (10-17) & 72C (10-18) In-Line Models

Inches    (millimeters)
Model A B C* D E F**
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)
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)
* Note for "C" dimension - direct drive units:
71C (10-17) 10.50 in. 
(266.70mm)
72C (10-18) 11.44 in.  (290.58mm)
**Direct drive model 71 (only) uses 4 in. (101.60mm) coupling.

General Information for Model 71C (10-17)

Ratings: Gasoline up to 310 HP @ 4200 RPM
Ratings: Diesel up to 182 HP @ 3200 RPM
Available Ratios: 1.00, 1.52, 1.91*, 2.10, 2.57, 2.91:1.00
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.)

General Information for Model 72C (10-18)

Ratings: Gasoline up to 475 HP @ 4200 RPM
Ratings: Diesel up to 274 HP @ 3200 RPM
Available Ratios 1.00, 1.52, 1.91*, 2.10, 2.57, 2.91:1.00
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.)

Models 71 & 72 Specification Downloads


Please be sure to visit our Used & Surplus page for great prices on Velvet Drive Marine Transmissions.



 
 

This Page Last Updated June 23, 2014

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