Sierra MP41000 Ignition Switch - 3 Position Magneto Sierra Marines replacement engine components are manufactured to meet or exceed OEM requirements. This ignition switch provides maximum corrosion protection and features a non-conductive housing that eliminates potential shorts. It also features an inner seal between the cylinder lock and contact plate. Specifications Push to choke Back up nut Brass Face nut Hex black plastic Hole Size 78 Length Short 58 maximum panel thickness Material Marine-