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...Tachometer harness control evinrude johnson box outboards following are instructions for installation of a wiring between veethree outboard tachometers and controls that include pin plug connection thru hp larger engines additional equipment required to complete insulated terminal lugs as see figure caution cables read these thoroughly before proceeding do not deviate from incorrect could cause electrical short possible fire always disconnect battery making any connections install in instrument panel included with con nect instructed the kit press purple wire onto ignition ign stud on back if lighting is desired connect free end blue light switch turns off gray sender send or whenever key note may be used supply vdc positive another gauge lt accessory requiring less than amp current draw black ground gnd leads they must taped prevent route through boat receptacle sure pins fully seated when dressed clamped tied support at intervals exceeding mm tie steering grd reconnecting system rech...