jinyi Boat Ignition Switch for Mercury Outboard — 3-Position 6-Lead Pre-Wired with Two Keys

This jinyi ignition switch with two keys is a direct-fit replacement for Mercury part numbers 87-88107A8 and 87-88107A5, restoring Off–Ignition–Start control and Push-to-Choke wiring for compatible outboards.

If your Mercury outboard (1994 and later with a side mount control box) is experiencing hard-to-turn keys, failure to start, or an unreliable ignition, this replacement switch is engineered to match OEM form and function. The unit arrives pre-wired with six leads for the Push-to-Choke setup, includes two cut-to-code keys, and uses marine-grade materials to resist corrosion and shock in wet, salty conditions.

Will this replace my Mercury 87-88107A8 or 87-88107A5 switch?

Yes — the jinyi switch is manufactured to fit the same mounting pattern and electrical layout as the referenced Mercury part numbers. It’s intended for side-mount control boxes on many Mercury outboards from 1994 onward that use a 3-position ignition with Push-to-Choke wiring.

• Direct-fit compatibility with OEM mounting and connector locations
• Supports Mercury part numbers 87-88107A8, 87-88107A5, 87-88107, 7-1155
• Pre-wired 6-lead harness matching Push-to-Choke configurations

How does the 6-wire design solve ignition problems?

The six integrated wires provide clear, factory-style connections for ignition, starter, ground, and choke circuits so the key rotates smoothly and the starter engages correctly. The design reduces loose or corroded connections that often cause intermittent starting or a stiff key.

• 3-position operation: Off, Ignition, Start
• Dedicated lead for Push-to-Choke functionality
• Potted base to prevent water intrusion and electrical faults

Is the switch durable enough for marine conditions?

Built from high-performance polyester and brass contacts, the switch is selected for electrical reliability and resistance to salt spray and vibration. The potted wiring and shockproof construction help maintain consistent operation in harsh environments where moisture and movement are common.

• Corrosion-resistant brass terminals for reliable conductivity
• Polyester housing resists UV and salt exposure
• Potted harness prevents water and salt intrusion into connections

How easy is installation and what comes in the box?

Installation is intended to be plug-and-play: the switch arrives pre-wired and fits the factory opening so no splicing or special tools are usually required. Two cut-to-code keys are included so you can secure the boat immediately after fitting.

• Pre-wired 6-lead harness for direct connection
• Comes with two matching keys
• No wire cutting or custom adapters expected for compatible models

Who is this for: Boaters, marine mechanics, and DIYers who own Mercury outboards (side mount control boxes, 1994 and newer) and need a reliable, OEM-style ignition replacement. Choose this jinyi switch if you want straightforward installation, a Push-to-Choke ready harness, corrosion-resistant materials, and two keys included so your vessel is ready to start again without delay.