Featuring the same patented design as the McGard Stern Drive and Outboard motor locks. A free-spinning collar will turn if attacked by gripping tools without loosening the lock. The best 24 hour protection against costly propeller theft. Propeller Locks for Stern Drive All Yamaha ; Propeller Locks for Outboard Motors Honda 75hp and larger ; Yamaha 115hp and larger ; Suzuki 40hp and larger ; Johnson/Evinrude 150hp and larger ;