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.
TAD offers Rebuilt exchange Velvet Drive 71 & 72 Series Transmissions. We can rebuild yours or offer one of our rebuilds on an exchange basis (subject to availability). When enquiring, you will need to furnish information from the original data plate. Model, Reduction, Size of output coupling which comes in 4” & 5”. There is a penalty for core transmissions that are returned in a non-rebuildable condition i.e. bad casings, gear damage, excessive input shaft wear or require more than service items to rebuild them.
Service Items include but not limited to:
You can ship your core in ahead of time, we will inspect it and determine if it is an acceptable core. Our testing process carried out on completion, checks for Oil Pressures, Oil Flow and Temperatures in Forward and Reverse. Transient boaters can expect priority service. Call us for pricing and availability.
Don’t forget to inspect the Damper Drive Plate Coupling while the transmission is removed. This is a wear item and is normally replaced while the transmission is removed. TAD carries a good stock of these plates.