Abstract: A transom mount has a transom mounting bracket and a leveling platform angularly adjustable relative to the transom mounting bracket. The leveling platform includes a vertical axis pintle, and a spring pin. Supported through the pintle onto the leveling platform is a carousel including rotary limit holes and a travel lock hole. The carousel generally spins freely about the pintle. However, when the spring pin is aligned with these carousel holes, it will automatically lock the carousel relative to the leveling platform. Supported on the carousel is a bell housing or other equivalent support having an engine coupling flange on one end and a long shaft coupler on the other. A set of tilt stop holes may be provided in combination with a tilt stop pin to control the maximum tilt of the bell housing and mud motor drive.