McGard SternDrive Lock

Theft Protection for MerCruiser, Cobra, Yamaha or Volvo Stern Drives.

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.

STERN DRIVE UNIT THREAD PART NUMBER
MerCruiser Alpha, Bravo I-III (Incl. X & XR), & Blackhawk
OMC Cobra & King Cobra
Volvo SX, DP-S		 7/16 - 20
7/16 - 20		 Single Drive
Twin Drive		 74018
74019
MerCruiser TRS & II SSM 1/2 - 20 Single Drive 74022
Yamaha M12 x 1.25 Single Drive 74024
MerCruiser III SSM,
IV SSM, V SSM, VI SSM		 5/8 - 18 Twin Drive 74026