1997+ Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-826148R2, Page 123Get this manual
Instrument Wiring Connections Without Light Switch
NOTE: IN UM WIRIN MU TA the RN SSpe edometer Tachometer TemperatureOil Warning Panel Volt Meter
TA NW TA NBLK
aTachometer eceptacle-From ontrol Box or Ignition hoke SwitchTachometer Wiring arnessLe ad to ptional Visual Warning Kit (Taped ack to arness)able xtension (F or Two unction Warning anel)Light Switch Wire