Mercury Gen 1 Side Mount Control Box Key Switch (17009A5)

The Mercury Gen 1 Side Mount Control Box Key Switch (17009A5) is a genuine OEM ignition switch assembly designed specifically for use in Mercury and Mariner Gen 1 side mount remote control boxes. This complete key switch unit is essential for reliable engine starting, accessory control, and secure operation of your outboard motor.

If your current key switch is loose, corroded, or malfunctioning, the 17009A5 offers a dependable replacement that restores smooth ignition performance. It includes the ignition barrel, pre-wired harness with bullet connectors, and two factory-cut Mercury keys—making it a direct plug-and-play solution with no cutting or splicing required.

The switch is designed to handle the rigors of marine use, with durable, corrosion-resistant materials that withstand exposure to moisture, salt, and UV. It offers smooth key turning action and secure engagement to reduce the risk of electrical failure or accidental ignition loss. Integrated functions include accessory position, ignition on, and spring-return to start—all essential for safe and efficient engine operation.

Compatible with Mercury/Mariner 2-stroke and 4-stroke outboards using the Gen 1 control system, this key switch is ideal for replacing worn-out or damaged ignition components without upgrading your entire control box.

Key Features:

• Genuine Mercury OEM key switch assembly

• Fits Gen 1 side mount remote control boxes

• Includes keys, ignition barrel, and pre-wired harness

• Replaces corroded or worn-out key switches

• Direct-fit, no modification required

• Durable marine-grade construction

Trust the Mercury Gen 1 Side Mount Control Box Key Switch (17009A5) to deliver reliable ignition performance and long-term durability for your Mercury outboard system.

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