Lower Unit Locks

Protect yourself with The Panther Security Systems’ new tamper-resistant Lower Unit Lock kits. These tamper-resistant bolts and nuts replace your existing lower unit bolt(s) and nut. Both require our unique tamper-resistant tool to install and remove. Each with a unique pin configuration to deter even a professional thief. The high-strength bell washer protects against utilizing any other clamping device to remove the bolt and/or nut, deterring the boldest of thieves.

Available in single, twin and triple-engine configurations. Constructed of marine-grade Stainless Steel for strength and corrosion resistance.

Please choose your engine below for product pictures and SKUs:

About Panther Security Systems

Panther Security Systems is an assortment of locks for boaters’ different needs. We offer all-new Lower Unit Locks which ensure your lower unit will be tamper-resistant.  We also offer turnbuckle locks with different strengths and finishes. In addition, we have a lock that mounts on a transom bolt up to 1/2 in (12mm) and is drill resistant.

SKU Number Motor TypeImage
758310Mercury Verado 150 - 300HP and OptiMax 115-250HP - Single Engine
758320Mercury Verado 150 - 300HP and OptiMax 115-250HP - Twin Engine
758330Mercury Verado 150 - 300HP and OptiMax 115-250HP - Triple Engine
758410 Evinrude 150-300HP - Single Engine
758420Evinrude 150-300HP - Twin Engine
758430Evinrude 150-300HP - Triple Engine
758510Yamaha 150HP and less - 20" Shaft - Single Engine
758520Yamaha 150HP and less - 25" Shaft - Single Engine
758540Yamaha 150HP and less - 20" Shaft - Twin Engine
758550Yamaha 150HP and less - 25" Shaft - Twin Engine
758610Yamaha 200HP and up /Honda All - Single Engine
758620Yamaha 200HP and up /Honda All - Twin Engine
758630Yamaha 200HP and up /Honda All - Triple Engine
758710Suzuki 200-300HP - Single Engine
758720Suzuki 200-300HP - Twin Engine
758730 Suzuki 225-300HP - Triple Engine

Accessories

Electro Steer

Ladders

Cleats

Outboard Brackets

Fluid Extractors

King Pin Anchors

Motor Lifts, Trim-Tilt

Security Systems

Safe-Skeg

Mount Plates

Steering & Controls

Panther XPS G2
TrollMaster
EZ-Steer
Panther Electro-Steer
Tie Bar & Hardware Kits
Wireless Remote Control

Accessories

Pontoon Accessories
Nylon Oarlock Sockets

Outboard Motor

Outboard Motor Brackets
Set-Back Brackets
Trim-n-Tilt / Motor Lift
Safe-Skeg Protection
O/B Motor Accessories

Maintenance

Fluid Extractors
Trailering Support

Anchoring & Mooring

King Pin Anchoring Systems
Water & Shore Spikes
Anchoring Accessories

Security Systems

Lower Unit Locks
Outboard Locks

Deck Hardware & Mounts

Electronics Mounts
Multi-Mounts
Trolling Mounts
Foot-Control Tray
Rod Holders

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