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Stern Drive Locks

Simply replace one of the stern drive mounting nuts with a McGard lock. Stern drive locks are fully machined from high quality stainless steel and through-hardened. This proven design features a free-spinning collar that turns if attacked by gripping tools without loosening the lock. Give yourself the best protection available against stern drive theft. Ask for McGard Marine Locks by name.
STERN DRIVE UNIT THREAD DRIVE PART #
MerCruiser® Alpha, Bravo I-III (Incl. X & XR), Blackhawk
OMC Cobra & King Cobra
Volvo SX, DP-S		 7/16 - 20
7/16 - 20		 Single
*Twin		 74018
74019
MerCruiser® TRS & II SSM 1/2 - 20
1/2 - 20		 Single
*Twin		 74022
74023
Yamaha M12 x 1.25
M12 x 1.25		 Single
*Twin		 74024
74025
MerCruiser® III SSM,
IV SSM, V SSM, VI SSM, NXT		 5/8 - 18 *Twin 74026
*Twin Drive sets include 2 locks and 1 key.

McGard is not responsible for changes to thread sizes by the manufacturer. Verify the correct thread size and application before installing locks.