FEDERAL MARINE MOTORS INC™ Manufacturing and Distributing Federal Flexible Couplings™ for over 65 years If your boat does this-- You need this. Federal Flexible Couplings™ reduce noiseabsorb vibrationprevent electrolysis Important facts about Federal Flexible Couplings™ protects transmission thrust bearings and seals from stress and wear due to shaft misalignmenthandles parallel and angular misalignmentallows no metal to metal contact, preventing shaft rumble from reaching enginerequires no lubrication or maintenancepermits simple installation; no shaft shortening or change of shaft locationallows engines on rubber mounts to float freelydampens oscillating shaft vibration in diesel installationsenables engine alignment without special toolsNeoprene rubber trunnions transmit thrust and torsional loadsThe trunnions can easily and economically be replaced in case of damage