Sierra MP51090 3-Position Magneto Ignition Switch Off-Run-Start Push-to-Choke

The Sierra MP51090 is a premium marine ignition switch designed as a direct replacement for Mercury Marine 87-17009A5. This three-position magneto switch features Off-Run-Start positions with push-to-choke functionality, making it ideal for outboard motors and marine engines requiring precise ignition control.

Key Features:

• Three-position magneto switch with Off-Run-Start configuration
• Push-to-choke feature for easy engine starting
• Marine-grade glass-filled polyester construction for maximum durability
• Six color-coded wire leads matching Mercury Marine factory color codes
• Impact-resistant and corrosion-resistant design
• Inner seal between cylinder lock and contact plate prevents moisture intrusion
• Non-conductive housing eliminates potential electrical shorts
• Heavy-duty potted construction for long-lasting reliability
• Fits standard 7/8" diameter mounting hole
• Maximum panel thickness: 5/8"
• Includes two umbrella-type keys with different key codes for added security

Electrical Ratings:

• Ignition: 15A @ 12V DC
• Solenoid: 30A @ 12V DC
• Choke: 7A @ 12V DC

This ignition switch features minimal bleed per circuit and requires no backup nut for installation. The hex black plastic face nut provides secure mounting while the potted terminal design ensures reliable electrical connections in harsh marine environments. Perfect for boat owners and marine technicians seeking a reliable OEM-quality replacement ignition switch.