SKARUMMER Boat Ignition Switch for Mercury/Mariner Outboards — 3-Position 6-Wire, 2 Keys, Brass Contacts

The SKARUMMER Boat Ignition Switch is a direct-fit replacement for many Mercury/Mariner outboard control boxes, providing a 3-position keyed start with matching 6-wire harness and two keys.

If your outboard's key feels loose, the engine won't crank reliably, or the original switch shows corrosion or intermittent power, replacing the ignition switch restores consistent starting and accessory power. This SKARUMMER unit is built for durability with polyester housing and brass contacts, supplied with two keys and wiring color-coded to match factory harnesses for plug-and-play installation.

How does this switch fit my Mercury or Mariner outboard?

This replacement is made to match common OEM form and function for many Mercury/Mariner control boxes. It replaces reference numbers 87-17009A2 and 87-17009A5 and is compatible with Sierra part numbers MP41070-2, MP41070-1, and MP41070 in many installations. Always compare the connector layout and wire colors with your existing switch before purchasing.

• Direct replacement for listed Mercury/Mariner part numbers
• 6-wire connector uses factory color codes for easier hookup
• Physical mounting and key orientation mirror OEM units
• Comes with two identical keys for immediate use or spares

What electrical and mechanical features does it include?

The switch offers three positions — OFF, RUN, and START — and a push-to-choke compatible 6-wire connection. Internal components use brass contacts for reliable conductivity and a high-performance polyester body for corrosion resistance in marine environments. Each unit is fully tested before shipping to ensure function.

• Three-position keyed operation: OFF / RUN / START
• High-quality brass terminals for stable electrical contact
• Polyester housing resists salt and moisture exposure
• Wire colors match factory standards for quick installation

How difficult is installation and what tools are needed?

Installation is designed to be straightforward: the wiring follows factory color codes and the connector mates directly to compatible control boxes, eliminating the need for splicing in most cases. Basic hand tools are typically sufficient, and a multimeter is helpful to confirm circuit continuity if troubleshooting is required. If your harness differs, consult your service manual or a marine technician.

• Plug-and-play connector for many Mercury/Mariner control boxes
• No wire splicing required when matched to original harness
• Common tools only: screwdriver, pliers, and optional multimeter
• Refer to boat service manual if connector differs

What warranty and support does SKARUMMER provide?

SKARUMMER backs this ignition switch with a 24-month warranty from the date of purchase, covering defects in materials and workmanship. Customer support is available for fitment questions or troubleshooting, and each switch is quality-checked before shipment to reduce returns. Keep your order details handy when contacting support for faster service.

• 24-month manufacturer's warranty included
• Pre-shipment testing to ensure reliable operation
• Customer support available for fitment and installation
• Two keys included for convenience and backup

Who is this product for? Boaters, marine mechanics, and DIY enthusiasts who need a dependable, OEM-style ignition replacement for Mercury or Mariner outboard control boxes will find this SKARUMMER switch useful. It's aimed at anyone seeking a straightforward, durable replacement with factory-compatible wiring and keyed security—ideal for restoring reliable starting and electrical control on older control panels or replacing a worn or faulty ignition switch.