Yamaha T8 Rigging Manual page 278

Outboard Rigging Guide - 2001
Twin-engine Speed Synchronization
Push and release the Mode button until the indi-
cator on the face of the gauge points to "SYNC."
The meter will display the difference of engine
speed (RPM) between the Port and Starboard
engines for reference for synchronizing the two
engines' speeds.
1. Port side engine speed is higher.
2. Port side engine speed is slightly higher.
3. Engine speed is synchronized evenly between
Port and Starboard engines.
4. Starboard engine speed is slightly higher.
5. Starboard engine speed is higher.
NOTE: If the two engine speeds are not synchro-
nized while cruising, they can be synchronized by
adjusting the trim angle or throttle position.
1.
2.
3.
4.
5.
Water Separator Warning Indication
NOTE: This indicator operates only when an
optional water separator with sensor has been
installed.
If the water which has been separated from the
fuel in the water trap exceeds a specific volume,
the indicator will blink to signal the water should
be drained or the filter changed.
5-41
Fuel Management Gauge