Marine Starter Switches Magneto grounded in "off" position glass filled delrin housing, stainless steel terminals, moulded velox base.13/16" diameter mounting bushing special weather proofing seal and drain hole. Furnished with terminal Hardware, Mounting Nuts and two keys. Features Special "Push to Choke" feature eliminates need for separate Electronic Choke Switch. Switch mounts in panels up to 1 /4" thick. Replaces - Johnson-Evinrude Numbers 388173, 390129, 390133. Specification Ratings Applications For Magneto applications. Note With Special Push to Choke Feature.