Tutor Auto Boat Ignition Switch Replacement for Mercury/Mariner — 2 Keys, 3-Position 6-Wire, Corrosion-Resistant

Tutor Auto replacement ignition switch for Mercury/Mariner outboards is a 3-position, 6-wire key switch (with 2 keys) designed to restore reliable start, run and push-to-choke control for compatible control boxes.

If your boat key feels stiff, the engine won't crank, or the factory switch shows corrosion, this direct-replacement ignition switch provides a cost-effective fix. Built to match the common Mercury OE interfaces 87-17009A5 and 87-17009A2, the unit uses a non-conductive housing and corrosion-resistant metal contacts to lower oxidation risk and extend service life. It arrives with two keys, factory-color-matched wiring for straightforward hookup, and a one-year warranty for peace of mind.

How does this switch match my Mercury/Mariner control box?

The Tutor Auto switch replaces common Mercury part numbers and fits most compatible Mariner outboard control boxes. It follows the same 3-position layout—Off, Ignition, Start—and uses a 6-wire connector arrangement for push-to-choke setups. Before buying, compare your existing switch wiring and mounting dimensions to ensure compatibility.

• Replaces OE: 87-17009A5, 87-17009A2, mp51090, MP41070-2, MP41070-1
• 3 positions: Off, Ignition, Start for standard operation
• 6-wire harness designed for push-to-choke systems
• Direct-replacement form, fit and function (non-genuine part)

Is installation difficult for a DIY boater?

Installation is intended to be user-friendly for anyone comfortable with basic wiring and boat maintenance. Wires are color-coded to match factory harness colors, allowing you to align each conductor easily. Typical installation takes under an hour with common hand tools and a wiring diagram or photos of the original switch.

• Color-matched wires reduce guesswork during hookup
• Standard mounting fits common Mercury control boxes
• No special tools required—screwdriver and pliers suffice
• Keep original wiring photos for reference before removal

What materials and durability features does it offer?

The switch body uses a non-conductive polyester housing to lower short-circuit risk and slow corrosion. Internal brass contacts and abrasion-resistant components maintain conductivity and mechanical life in a marine environment. These choices provide a balance between affordability and reliable performance near saltwater or fresh water.

• Non-conductive polyester housing for safety and longevity
• Brass contact points for consistent electrical conductivity
• Corrosion- and abrasion-resistant construction for marine use
• Comes with two keys to reduce risk of being locked out

What support and warranty come with the part?

The product includes a one-year limited warranty and customer support from Tutor Auto. If you encounter fitment questions or wiring issues, contact the seller for troubleshooting or replacement options. Remember this is an aftermarket replacement built to OEM-equivalent standards, not an original Mercury-manufactured component.

• One-year warranty included
• Customer support available for fitment or installation help
• Aftermarket direct replacement meeting OEM-style specifications
• Return options depend on seller policy—save packaging and receipts

Who is this for? This Tutor Auto ignition switch is aimed at boat owners, marine mechanics, and DIYers who need an affordable, drop-in replacement for worn or corroded Mercury/Mariner ignition switches. It suits people who value an easy installation with color-matched wiring, require push-to-choke compatibility, and want two keys included. If you need a genuine Mercury part, check OEM sources; if you want an economical aftermarket replacement that restores reliable starting and control, this is a practical choice.