Twin-Engine Speed Synchronizer; Warning System; Overheat Warning (Twin Engines) - Yamaha F115D Owner's Manual

Basic components
greater if the engines are of different year
models. In addition, variations in propel-
lers, even of the same basic dimensions of
the same design, can also cause a slight
variation in fuel consumption.
EMU26780

Twin-engine speed synchronizer

This gauge displays the difference in engine
speed (r/min) between the port and star-
board engines for reference purposes when
synchronizing the two engines' speeds.
Press the " " (mode) button repeatedly
until the indicator on the face of the gauge
points to " " (synchronizer).
1. Port engine speed is higher
2. Port 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
25
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1
2
3
4
5
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NOTE:
If the two engines' speeds are not synchro-
nized while cruising, they can be synchro-
nized by adjusting trim angle or throttle.
EMU26801

Warning system

ECM00090
CAUTION:
Do not continue to operate the engine if a
warning device has activated. Consult
your Yamaha dealer if the problem can-
not be located and corrected.
EMU30340

Overheat warning (twin engines)

This engine has an overheat warning device.
If the engine temperature rises too high, the
warning device will activate.
Activation of warning device
Engine speed will automatically decrease
G
to 2000–3500 r/min.
If equipped with an overheat warning indi-
G
cator, it will light.
ZMU04746