Sierra MP39100 Ignition Switch, 3-Position Magneto with Lanyard, Replaces Evinrude/Johnson 386545

The Sierra MP39100 is a 3-position magneto ignition switch built for outboard and marine engines that use a magneto-style or conventional ignition circuit. It features a brass back up nut and a hex black plastic face nut, with a 7/8 inch hole size for mounting through the dash or console. An inner seal between the lock cylinder and the contact plate helps keep moisture and salt spray out of the electrical contacts, and the non-conductive housing is designed to eliminate the potential for shorts at the switch body. The switch is rated for 12 volt systems at 20 amps and is built to resist corrosion, an important feature for any component mounted in a marine engine's electrical system.

The MP39100 is designed as a direct interchange for the Evinrude/Johnson 386545 ignition switch, making it a straightforward replacement when an original equipment switch has failed, corroded, or worn out. It works with both magneto and conventional outboard ignition systems, and its compact 0.39 x 0.39 x 0.39 inch dimensions match standard ignition switch mounting cutouts.

Specifications

• Brand: Sierra
• Manufacturer Part Number: MP39100
• Position: 3-Position (Magneto)
• Back Up Nut Material: Brass
• Face Nut: Hex Black Plastic
• Hole Size: 7/8 inch
• Voltage: 12 Volts
• Amperage: 20 Amps
• Exterior Finish: Machined
• Dimensions: 0.39 x 0.39 x 0.39 inches
• Weight: 0.28 pounds
• OEM Cross Reference: Evinrude/Johnson 386545

Replaces (OEM)

• Evinrude/Johnson 386545

Frequently Asked Questions

What does the Sierra MP39100 ignition switch replace? The MP39100 is a direct interchange for the Evinrude/Johnson 386545 ignition switch, so it can be installed as a replacement wherever that original switch was used.

Is the MP39100 a genuine Evinrude/Johnson part or aftermarket? The MP39100 is a Sierra-branded aftermarket ignition switch manufactured to be interchangeable with the Evinrude/Johnson 386545, not an OEM Evinrude/Johnson part.

What size mounting hole does this switch need? The Sierra MP39100 requires a 7/8 inch hole size for mounting through the dash or console.

Will the MP39100 work with a magneto ignition system? Yes, the MP39100 is a 3-position magneto switch that works with both magneto and conventional outboard ignition systems.

What is the voltage and amperage rating of the MP39100? This ignition switch is rated for 12 volt systems at 20 amps.

What materials are used in the MP39100 ignition switch? The MP39100 uses a brass back up nut and a hex black plastic face nut, with a machined exterior finish.

How does the MP39100 protect against corrosion? The switch is built with maximum corrosion protection to eliminate oxidation, along with an inner seal between the lock cylinder and the contact plate to keep moisture out of the electrical contacts.

Why does the MP39100 have a non-conductive housing? The non-conductive housing on the MP39100 is designed to eliminate the potential for electrical shorts at the switch body.

What are the physical dimensions of the MP39100? The Sierra MP39100 ignition switch measures 0.39 x 0.39 x 0.39 inches.

How much does the MP39100 ignition switch weigh? The MP39100 weighs 0.28 pounds.

Does the MP39100 include a lanyard? The MP39100 is a 3-position magneto switch designed for use with a lanyard-style ignition setup.