Sierra MP39740-1 3 Position Ignition Switch - MagnetoFeatures: Back Up Nut: Plastic; Face Nut: Knurled Black Plastic with Rubber Cap; Hole Size: 7/8"; Length: Short: 5/8" maximum panel thickness; Material: Marine grade glass-filled Polyester; Rated Accessory: 15 Amp @ 12v DC; Rated Ignition: 15 Amp @ 12v DC; Rated Solenoid: 30 Amp @ 12 VDC; Terminal Type: 5 Color Code Wires; Switch Positions: Off - Run - Start; Type: 3 Position Magneto; Maximum corrosion protection - eliminates oxidation; Inner seal between cylinder lock and contact plate; Non-conductive housing eliminates potential shorts; For: Outboard engines without choke circuit;