Reset Mercury Monterey Engine Oil Change Due Light Procedure:
- Press the SETUP (or STATUS) button repeatedly until you see the “System Check” menu
- Press the RESET button repeatedly until you see the “Oil Life XXX% Hold Reset New” menu
- Press and hold the RESET button for 2 seconds or until the display shows “If New Oil, Hold Reset”
- Release, then press and hold the RESET button again until display shows “Oil Life Set To 100%”
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