Mercury 4 Position Ignition Key

Ensure smooth and secure operation of your Mercury outboard engine with a Mercury 4 Position Ignition Key. Designed specifically for Mercury ignition systems with a 4-position switch—OFF, RUN, START, and ACCESSORY (ACC)—this key offers reliable performance and a perfect fit for a wide range of Mercury and MerCruiser models.

Whether you’ve misplaced your original key or simply want a backup, this replacement ignition key is precision-engineered by Mercury to work seamlessly with compatible 4-position ignition switches. It slides smoothly into the ignition cylinder and engages with solid, positive feedback—so you can start your engine confidently, every time.

Constructed from high-strength materials and corrosion-resistant alloys, the Mercury 4-position key is built to endure harsh marine conditions. It’s compact, durable, and ideal for everyday use in both saltwater and freshwater environments.

This key is commonly used with Mercury Gen 2 side-mount remote control boxes and ignition panels featuring a 4-position configuration. Please verify the compatibility of your control box or ignition switch before ordering. Not interchangeable with older numeric key systems (key codes 1–10), this key is specifically shaped for modern Mercury 4-position switches.

Features:

• Genuine Mercury Marine ignition key

• Suits 4-position switches: OFF, RUN, START, ACC

• Compatible with Gen 2 Mercury side-mount control boxes

• High-quality corrosion-resistant metal construction

• Smooth operation and secure locking engagement

• Ideal replacement or backup key for your boat

Applications:

• Mercury and MerCruiser 4-stroke and 2-stroke outboards

• Gen 2 remote control boxes (such as part number 897716K01)

• Ignition panels with a 4-position switch design

Why Choose Genuine?
Using an authentic Mercury key ensures compatibility and eliminates the risks of damage caused by generic, poorly cut replacements. When you rely on your engine’s ignition to start without fail, choose the key made to do the job right—choose Mercury.

Keep a spare in your tackle box, glove compartment, or gear bag—you never know when you’ll need it.

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