McGard Stern Drive Locks - Single & Twin Sets for Mercruiser, OMC Cobra, Volvo Drives
McGard Stern Drive Locks - Single & Twin Sets for Mercruiser, OMC Cobra, Volvo Drives
McGard stern drive locks protect your outdrive from theft while trailering, docking, or storing your boat. Machined from high-quality stainless steel with McGard's signature free-spinning collar design, these locks replace one of your existing stern drive mounting nuts and defeat pliers, wrenches, and other gripping tools -- if a thief tries to force it, the collar just spins freely instead of turning the lock. Available as a single lock for one stern drive or a twin lock set for boats with dual outdrives, this line covers the most common stern drive threads used on Mercruiser Alpha and Bravo I-III drives, OMC Cobra and King Cobra drives, and Volvo Penta SX and DP-S drives.
Specifications
- Brand: McGard
- Thread Size: 7/16-20
- Hex Size: 5/8 inch
- Overall Lock Length: 0.750 inches
- Material: Stainless steel, through-hardened
- Exterior Finish: Brushed
- Special Features: Free-spinning collar, theft-resistant design
- Weight (single): 1.5 pounds
Sizes & Options
Choose the Single Lock if your boat has one stern drive, or the Twin Lock Set if you run dual outdrives -- the twin set includes two complete lock, key, and cap assemblies so both drives get matching protection from a single purchase. Both configurations share the same 7/16-20 thread and 5/8 inch hex, fitting Mercruiser Alpha/Bravo I-III, OMC Cobra/King Cobra, and Volvo SX/DP-S drives.