Abstract: A process and a portable apparatus for performance testing of boat motors, especially with outboard drives. A brake disc is rotatably journalled in a hub of a supporting element which carries brake callipers and a lever arm, at the outer end of which a force-measuring instrument is arranged and is tensioned between the lever arm and a resistance in the form of an arm which can be clamped onto the cavitation plate of the drive. During performance testing of a boat motor, the propeller is removed and in its place the brake disc is non-rotatably mounted on the propeller shaft. The force-measuring instrument is connected to a display which gives directly the braked torque.

Abstract: A change-over device for connecting a selected one of two incoming Bowden cables with an outgoing Bowden cable to transmit operating movement has three parallel swing arms individually rotatable about a common axis. The incoming cables are connected with the outer arms and the outgoing cable is connected with the center arm. The center arm is provided with an axially extending coupling pin which can be made to engage, by axial movement of the center arm, a corresponding hole in the arm associated with the selected cable, thereby coupling these two arms for unison movement.