Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 118Get this manual
Multi-Function Gauge Dip Switch SettinglTesting
NOTE: The multi-function gauge "Dip Switch" must be set on the back of gauge prior to operationTurn the ignition switch to the "OFF" position before setting dip switchThe gauge will reset to selected settings when the ignition is turned "On"
IMPORTANT: Test the gauge and related wiring BEFORE making final "Dip Switch" settings and BEFORE securing the gauge to dashboard of boat1With the ignition switch in the "Off" position, set the multi-function gauge "Dip Switch" in (test) position as shown(Black dot indicates switch position)
aGauge Lights (Red)Gauge L.C.DBar Graph (Black)
Outboard Multi-Function Gauge Setting
Model Test Display (All) Dip Switch Setting
Open 275 hp (3.4 Litre) Outboards (single engine)
a"Dip Switch" (shown in test position)Black DotSwitch in "Open" Position