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Stainless steel sterndrive theft lock nut 716046

MCGARD

MCGARD Sterndrive Theft Lock 716046

SKU CH-3RQB-JAQ19

A stainless steel sterndrive theft lock that replaces a mounting nut to secure Mercruiser and Cobra engines

  • Main materialStainless steel
  • Secures sterndrive against theft with a keyed locking nut
  • Made from stainless steel for marine corrosion resistance
  • Through-hardened construction resists cutting and sawing attacks
  • Direct replacement for a standard Mercruiser or Cobra mounting nut
  • Simple installation by swapping one existing nut with lock 716046

What It Is

The MCGARD Sterndrive Theft Lock 716046 is a stainless-steel motor lock that replaces one factory mounting nut on a Mercruiser or Cobra sterndrive. It secures the drive unit against theft without adding an alarm system. Boat owners who keep their craft on moorings, lifts or trailers gain a tamper-resistant barrier that installs with basic hand tools.

How It Fits

Installation requires removing a single existing nut and threading the McGard lock in its place using the supplied nut pattern. No drilling, wiring or additional brackets are needed, so the original mounting hardware and alignment remain untouched. The through-hardened stainless construction resists corrosion in saltwater environments while freeing the owner from separate chains, cables or electronic alarms.

Upgrade Path

This lock replaces a standard unsecured mounting nut on compatible Mercruiser and Cobra engines. The jump is worth it when the sterndrive is exposed in unmonitored marinas, dry-stack facilities or on trailers where a basic nut offers no deterrent. It is not suited for drives that use non-standard thread patterns or for owners who prefer an integrated alarm function.

How it compares

Measured against everything we stock in Boat Engine Components & Locks, at today’s prices. Recalculated every night.

Price $47.99
Pricier than about 95% of the 21 comparable items (median $6.99).

Specifications

Product
Brand nameMCGARD
Model nameSterndrive Theft Lock
Size & build
Main materialStainless steel

Questions about this item

What material limits the lock's lifespan under sustained marine exposure?

The lock is fully machined from through-hardened stainless steel for corrosion resistance.

How much noise or heat does the lock generate during continuous operation?

The lock has no moving parts, alarm or electronics, so it produces no noise or heat.

Which sterndrive mounting nut must the buyer already have to install this lock?

The lock replaces one existing Mercruiser or Cobra sterndrive mounting nut directly.

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