"LK" Vertical Drive/Transom Bracket Service Manual P/N 507281. Copyright 1996. Please view Photo #2 for models covered in this manual. This service manual is a must-have for anyone who owns a vertical drive or transom bracket for their boat or watercraft. It provides detailed information on how to adjust and maintain your equipment for optimal performance. The manual is specifically designed for OMC makes and is manufactured in the United States. With this manual, you can ensure that your vertical drive or transom bracket is installed correctly and that you are getting the most out of your equipment. It is a valuable resource for any boat or watercraft owner who wants to keep their equipment in top shape. Free Priority Shipping.