When selecting a pontoon boat ignition switch, the goal is dependable starting, easy maintenance, and compatibility with common Mercury and OMC control boxes. This guide highlights five well-muited ignition switch options, explaining who each is best for, and why they were chosen. It helps boaters, restorers, and DIY installers choose a switch that fits their panel, wiring, and choke needs while avoiding common pitfalls.
| Product | Best For | Key Benefit |
|---|---|---|
| 87-88107A5 Boat Ignition Switch with 2 Keys 6 Wire Connectors | Mercury outboards with push-to-choke setups | Marine-grade materials, corrosion protection |
| Boat Ignition Switch with Keys 87-17009A5/87-17009A2 | 3-position, 6-wire setups | Plug-and-play replacement, clear wiring colors |
| Boat Ignition Switch with Key, 3 Position (Mercury) | Mercury/Mariner panels | Durable, easy to install |
| Ignition Starter Switch for Johnson Evinrude | OMC inboard/outboard applications | Push-to-choke to simplify starting |
| Boat Ignition Switch with Key Replacement (Mercury/Mariner) | Mercury control boxes | Solid brass and polyester construction |
87-88107A5 Boat Ignition Switch With 2 Keys
This 6-wire, 2-key ignition switch is designed for Mercury outboards produced from 1994 onward. It uses marine-grade glass-filled polyester housing to resist corrosion and electrical shorts, making it ideal for exposed panel mounting on pontoon boats. It is best for owners seeking a direct replacement with a secure, non-conductive housing and a push-button choke feature.
Who it’s best for: Pontoon operators with Mercury engines that require a push-to-choke function and a robust, corrosion-resistant switch. Choose this if you want OEM-style compatibility and a straightforward install with minimal wiring changes.
Limitation: Verify the exact OEM part numbers (87-88107, 87-88107A5, 7-1155) to ensure precise fitment on your control box.
Boat Ignition Switch With Keys 87-17009A5/87-17009A2
This switch features 6 wires, 3 positions (OFF-RUN-START), and two keys. It emphasizes plug-and-play replacement with color-matched wires to factory codes, and is rated for marine use with polyester and brass components. It supports push-to-choke functionality and is a solid option for Mercury control boxes needing a reliable replacement.
Who it’s best for: Boat owners who want an easy, color-coded wiring replacement that matches OEM standards, with quick install and reliable startup. Choose this if you value a straightforward swap and clear compatibility notes.
Limitation: Confirm the wiring color codes match your harness before purchasing to avoid miswiring on a different panel layout.
Ignition Starter Switch For Johnson Evinrude
This ignition switch targets Johnson Evinrude inboard/outboard applications with a push-to-choke design and 6 terminals. It is a practical option for pontoon setups that utilize OMC systems and require a simplified choke method integrated into the ignition key switch.
Who it’s best for: Pontoon boats using Johnson Evinrude systems seeking a compact, 6-terminal switch with push-to-choke. Choose this if you need a straightforward OMC-compatible replacement.
Caution: Ensure your panel thickness and mounting depth align with the switch specifications to avoid interference with dash fittings.
Mercury/Mariner Replacement Key Switch With 3 Positions
This 6-wire, 3-position ignition switch is designed as a replacement for Mercury/Mariner control boxes. It includes two keys and emphasizes durable polyester and brass construction, with an internal seal to protect against moisture ingress. It supports 5/8-inch panel thickness limits and push-to-choke functionality.
Who it’s best for: Pontoon owners needing a direct Mercury/Mariner replacement with robust materials. Choose this for a cartridge-like fit when replacing aging OEM switches.
Limitation: Verify that the OEM references (87-17009A2/87-17009A5, Sierra MP41070 series) match your specific model before ordering.
Buying Guide
- Compatibility checks: Confirm your engine brand (Mercury, Mariner, Johnson/Evinrude, OMC) and the specific control box part numbers before selecting a switch. Even small differences in the 3-position vs 2-position configurations matter for proper operation.
- Wiring and panel fit: Verify panel thickness and the number of terminals. Most switches shown use 6 wires and fit up to 5/8 inch panel thickness. Ensure your dash can accommodate the switch body and any choke mechanism.
- Push-to-choke vs separate choke: If your boat uses a push-to-choke design, choose a switch that explicitly includes this feature. It can simplify starting and avoid an extra choke lever on the dash.
- Material and corrosion resistance: Marine-grade polyester housings and brass terminals improve longevity in salt or spray environments. Look for non-conductive housings to prevent shorts.
- Keys and security: Two-key configurations provide a backup and reduce the risk of being locked out if a key is misplaced. This is especially useful for rental pontoons or multi-operator boats.
- Replacement vs OEM fit: If replacing an aging switch, matching OEM part numbers helps ensure plug-and-play compatibility. If uncertain, compare the wiring colors and terminal layout to your current switch.
Frequently Asked Questions
- What is a push-to-choke ignition switch? It automatically engages the choke when you push the key, simplifying cold starts on outboard engines.
- Are three-position switches only for Mercury? Not necessarily; many brands use OFF-RUN-START configurations, but always verify the wiring and mounting specs for your model.
- Can I replace my ignition switch myself? Yes, with careful wiring and correct part numbers, a straightforward plug-and-play replacement is possible for many Mercury, Mariner, and OMC setups.
- What happens if the panel is thicker than the switch allows? The switch may not mount securely or may short against the panel; check the maximum panel thickness (commonly 5/8 inch).
- Is a 6-wire switch always needed? Most Mercury/Mariner/OMC switches use 6 wires, but some older or different systems may use fewer or more; verify your harness first.
- Do these switches provide corrosion protection? Yes, many options use marine-grade housings and brass contacts to resist corrosion in exposed marine environments.