If you’re outfitting a pontoon boat, a reliable ignition switch is essential for quick starts and simple engine control. This guide highlights five compatible ignition switches designed for Mercury, Mariner, and other common outboard/inboard setups. Best for boaters who want straightforward plug-and-play installs, durable marine-grade components, and reliable push-to-choke operation. The following products are selected for compatibility, easy wiring, and clear replacement paths when your existing switch wears out or fails.
Quick comparison at a glance: the table below lists each product, its primary compatibility, and notable strengths. Use this as a fast reference when deciding which model matches your control box and panel depth needs.
| Product | Brand | Best For | Notes |
|---|---|---|---|
| 87-88107A5 Boat Ignition Switch with 2 Keys | AUTOBABA Store | Mercury outboards, 1994 and later | Premium marine-grade housing, non-conductive, push choke |
| Boat Ignition Switch with Keys 87-17009A5 / A2 | MANUTEX Store | Mercury outboards, 3-position, 6-wire | Plug-and-play with color-matched wiring; 30A rating |
| Boat Ignition Switch with Key (Mercury/Mariner 87-17009A2/A5) | MIYIMORE Store | Mercury outboards, 6-wire, push-to-choke | 3-position; durable polyester/brass construction; seal included |
| Ignition Starter Switch for Johnson Evinrude | Generic | OMC inboard/outboard combos | Push-to-choke; 6 terminals |
| Boat Ignition Switch with Key Replacement for Mercury Mariner | SKARUMMER Store | Mercury outboards, 6-wire | 3-position; 2 keys; 87-17009A2/A5 compatibility |
87-88107A5 Boat Ignition Switch with 2 Keys
This switch is designed for Mercury outboard motors from 1994 onward. It features a non-conductive housing and marine-grade construction, helping prevent shorts and corrosion in saltwater environments. Best for boaters needing a direct replacement with a push-to-choke function and two included keys. A potential limitation is that it’s most compatible with Mercury controls; verify your exact control box model before ordering.
Boat Ignition Switch with Keys 87-17009A5 / A2
Offered as a direct replacement for Mercury control boxes, this switch features 6 wires and a 3-position OFF-RUN-START arrangement with push-to-choke. Best for Mercury owners who want a plug-and-play upgrade with color-coded wiring. A caution: ensure your panel thickness is within the 5/8 inch limit for proper fit, and confirm the exact OEM reference (87-17009A2 or A5) for compatibility.
Boat Ignition Switch with Key (Mercury/Mariner)
This switch supports Mercury outboard control boxes with 6 wires and provides 3-position OFF-RUN-START. It’s a practical option for replacing aging switches in Mercury or Mariner setups. Choose this if you need a straightforward 6-wire, push-to-choke solution that aligns with common OEM references. Limitation: verify the exact model compatibility to avoid mismatches in harness wiring.
Ignition Starter Switch for Johnson Evinrude
Intended for Johnson Evinrude inboard/outboard configurations, this 6-terminal ignition switch uses a push-to-choke design. Best for operators with Johnson/OMC systems seeking a 6-wire, three-position solution. A caution: ensure the switch’s fit with your specific control layout and panel depth, as some side-mounted panels may require careful clearance checks.
Boat Ignition Switch with Key Replacement for Mercury Mariner
Marketed as a Mercury/Mariner replacement, this 6-wire, 3-position switch includes two keys and matches the 87-17009A2/A5 references. Best for owners seeking a reliable aftermarket alternative with clear compatibility notes. Use caution to confirm the exact OEM numbers for your model to ensure proper fitment and electrical compatibility.
Buying Guide
What should you check before buying?
- Compatibility: Confirm your control box brand and OEM part number (for Mercury/Mariner/Johnson/Evinrude) to ensure a correct replacement.
- Wiring configuration: Ensure the switch provides the same number of wires (6) and the same 3-position layout (OFF-RUN-START) to avoid rewiring.
- Panel depth: Check maximum panel thickness (often up to 5/8 inch) to ensure the lock cylinder sits properly and the knob clears the surface.
- Construction: Look for marine-grade polyester or brass components with a non-conductive housing to reduce corrosion risk in saltwater environments.
- Push-to-choke function: If your vessel requires choking from the switch, verify the inclusion of push-to-choke in the model description.
Direct replacement vs. upgrade
- Direct replacement: Choose a model that lists your OEM part numbers (e.g., 87-17009A2/87-17009A5) for a straightforward swap.
- Upgrade considerations: If your current switch is difficult to operate or feels loose, consider a switch with better sealing, higher current rating (where applicable), and a durable housing.
Installation tips
- Disconnect the battery before wiring to avoid sparks or shorts.
- Match wire colors to factory codes where possible; label wires if reusing existing harnesses.
- Inspect seals and gaskets to prevent water intrusion into the control box area.
FAQ
- Q: Will these switches fit any Mercury outboard control box?
A: They are intended to fit many Mercury models, but always verify the exact OEM part numbers and panel depth before purchasing. - Q: Do these switches require wiring knowledge?
A: Basic wiring knowledge helps, especially matching wire colors; some models advertise plug-and-play simplicity. - Q: Is push-to-choke available on all models?
A: Not all; check the product features to confirm push-to-choke capability. - Q: Can I replace a Johnson/Evinrude switch with a Mercury switch?
A: Replacement feasibility depends on terminal layout and wiring harness compatibility; verify the 6-terminal design and control box compatibility. - Q: Are there any restrictions on panel thickness?
A: Yes, many models specify a maximum panel thickness of 5/8 inch for proper fitment. - Q: Do these switches include keys?
A: Several options come with two keys; check the product description to confirm.