This starter motor is compatible with Marine outboard engines including models 50EL, 50EH, 50ELH, and 50ELPT, as well as part numbers 50-73521, 50-44369, 44369, 44369A1, 50-44369, and 50-44369A1.Operating at 12V with counterclockwise rotation, it ensures proper engine engagement.The drive features 8 teeth or splines for correct meshing with the flywheel.Weighing 9.585 lbs (4.36 kg), the unit offers a balance of and manageable weight for ease of handling during installation.With a field case length of 6.17 inches (156.8 mm), the motor is constructed to endure marine conditions.Mounting is supported by standard 1/4-20 and 5.3 mm holes for secure attachment.Its compact design allows direct replacement without modifications.This starter motor meets applicable performance standards and is tested for consistent under normal marine use conditions.