- HIGH QUALITY MATERIAL: The 87 17009A5 boat ignition switch is constructed from high-performance polyester and premium brass. This combination ensures exceptional corrosion resistance, durability, and electrical conductivity. The non-conductive housing prevents short circuits, enhancing overall longevity. - REPLACE PART NUMBER: This ignition switch is compatible with OE part numbers 87 17009A5, MP41070 2, MP41070 1, and MP41070. It features a 6-wire configuration, making it suitable for most Mercury outboard motor control boxes. Verify that the part number matches your requirement before purchasing. - COMPATIBILITY: Specifically designed for use with Mercury Mariner Outboard DFI, EFI, and MPI remote control boxes, the MP41070 2 ignition key switch is essential for reliable engine operation. If you experience difficulty starting your boat or need to wiggle the key to make it work, it's time to replace your ignition switch. - FUNCTIONALITY: This ignition switch includes 6 wires and offers 3 positions: OFF, RUN, and START. Its push-back feature is designed to work seamlessly with magnetic controlled ignition systems, providing excellent corrosion protection and preventing oxidation. - APPLICATIONS: Ideal for both recreational and commercial boaters, this ignition switch ensures a reliable start every time you head out on the water. Perfect for replacing faulty ignition systems in your Mercury outboard motor, it enhances your boat's performance and safety during operation. - SIZE AND PERFORMANCE: Designed for optimal performance in various marine environments, this ignition switch combines robust construction with practical functionality, making it a vital component for any Mercury outboard motor setup.