Sierra MP52000 3-Position Magneto Ignition Switch, Off-Run-Start, Push to Choke, Replaces Mercury 87-17009A5

The Sierra MP52000 is a 3-position magneto ignition switch built for marine engines that use an off-run-start switching arrangement with a push-to-choke function. It is designed as a direct equivalent for the Mercury 87-17009A5 switch, making it a straightforward replacement when an original switch fails or needs upgrading. The switch operates on a 12-volt electrical system and uses a normally-open contact design with six color-coded wire leads that are potted for protection against moisture and vibration, a common failure point in marine environments.

Construction is polyester and plastic, with a hex black plastic face nut for panel mounting and no back-up nut required, simplifying installation from the front side of the dash or console. The switch is short in length, requiring only 5/8 inch of maximum panel thickness, which allows it to fit tight helm layouts. Contact points are stainless steel for corrosion resistance in the marine setting. Sierra manufactures this switch to meet or exceed the performance of the original equipment part it replaces, and Sierra supplies OEM engine manufacturers and boat builders with parts on a daily basis.

Specifications

• Brand: Sierra
• Manufacturer Part Number: MP52000
• Switch Type: 3-Position Magneto Ignition Switch
• Switch Positions: Off-Run-Start
• Special Function: Push to Choke
• Operating Voltage: 12 Volts
• Contact Type: Normally Open
• Terminal Type: 6 Color Coded Wire Leads, Potted
• Contact Material: Stainless Steel
• Material: Polyester, Plastic
• Face Nut: Hex Black Plastic Face Nut
• Back Up Nut: Not required
• Maximum Panel Thickness: 5/8 inch
• Item Dimensions: 0.39 x 0.39 x 0.39 inches
• Color: White
• Weight: 0.39 pounds

Fitment

Universal fit for marine vehicles with 12-volt electrical systems and standard ignition switch connections.

Replaces (OEM)

• Mercury 87-17009A5

Frequently Asked Questions

What does the Sierra MP52000 replace? The Sierra MP52000 is a direct replacement for the Mercury 87-17009A5 ignition switch, so it can be installed anywhere that Mercury part is called for.

How many positions does this ignition switch have? It has 3 positions: Off, Run, and Start, with a push-to-choke function built into the switch.

What voltage is the MP52000 ignition switch rated for? It is rated for 12-volt marine electrical systems.

What is the MP52000 made of? The switch body is constructed of polyester and plastic, with a hex black plastic face nut and stainless steel contacts.

How much panel thickness does the MP52000 require for mounting? A maximum of 5/8 inch of panel thickness is needed, and the switch does not require a back-up nut for installation.

What are the terminal connections on this switch? The Sierra MP52000 uses 6 color coded wire leads that are potted for protection in the marine environment.

Is the MP52000 an OEM part or aftermarket? It is a Sierra-branded aftermarket switch engineered to meet or exceed the performance of the original Mercury 87-17009A5 it replaces.

What size is the Sierra MP52000 switch? Item dimensions are 0.39 x 0.39 x 0.39 inches, and the switch weighs 0.39 pounds.

What color is the MP52000 ignition switch? It is white.

Does the MP52000 fit a specific boat make or engine year? The switch is a universal fit for marine vehicles with 12-volt electrical systems and standard ignition switch connections, rather than being limited to one boat make or model year.

Are the contacts on the MP52000 corrosion resistant? Yes, the contact material is stainless steel, which resists the corrosion common in marine ignition switches.

Is a bulk pack version of the MP52000 available? The MP52000 is the individual unit version of this Sierra 3-position magneto ignition switch.