McGard outboard motor locks are designed to lock the outboard onto the transom of the boat.
Simply replace one of the mounting nuts with a McGard locking nut.

McGard outboard motor locks are identical in quality and construction to our stern drive locks.
A free-spinning collar turns if attacked by gripping tools, protecting you against costly outboard motor theft and the resulting inconvenience.

Fits the following Outboards:
Mercury/Mariner 40 HP and larger (2 stroke)
Mercury 25 HP and larger (4 stroke)
Suzuki 150 - 300 HP
Description: Single Motor Lock Stainless Steel 1/2"-20 Thread

Model#74036