Yamaha F250 Owners Manual

Basic components
25

The fuel consumption meter and fuel econ-
omy meter will indicate the same unit of
measurement.
EMU26760Fuel consumption meter
This gauge displays the total amount of fuel
consumed since the gauge was last reset.
Press the “” (mode) button repeatedly
until the indicator on the face of the gauge
points to total “” (total). To reset the total
fuel consumption to zero, press the “” (set)
and “” (mode) buttons at the same time.
EMU26770Fuel economy
This gauge displays the distance per...

Basic components
26
even of the same basic dimensions of the
same design, can also cause a slight varia-
tion in fuel consumption.
EMU26780Twin-engine speed synchronizer
This gauge displays the difference in engine
speed (r/min) between the port and starboard
engines for reference purposes when syn-
chronizing the two engines’ speeds.
Press the “” (mode) button repeatedly
until the indicator on the face of the gauge
points to “” (synchronizer).
NOTE:
If the two engines’ speeds are not synchro-
nized...

Basic components
27
EMU31680Tachometer unit
The tachometer shows the engine revolutions
per minute. It has functions of trim meter, ad-
justing trolling speed, cooling water/engine
temperature display, battery voltage display,
total hour/trip hour display, oil pressure dis-
play, water detection warning, engine trouble
warning, and periodic maintenance notifica-
tion. If optional sensors are connected to the
unit, cooling water pressure display will be
available. For the optional sensor, consult
your...

Basic components
28
Preoperation checks
Place the gear shift lever in neutral and turn
the main switch to “” (on). After all the dis-
plays come on and the total hour display
comes on, the gauge will change to normal
operation. If the buzzer sounds and the water
separator warning indicator blinks, consult
your Yamaha dealer immediately.
NOTE:
To stop the buzzer, press the “” (set) or
“” (mode) button.
Low oil pressure warning
When the engine oil pressure drops too low,
the low oil pressure warning...

Basic components
29
CAUTION:
ECM01590

Do not continue to run the engine if the
overheat warning indicator blinks. Seri-
ous engine damage will occur.

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.
Water separator warning
This indicator will blink when water has accu-
mulated in the water separator (fuel filter)
while cruising. In such an event, stop the en-
gine immediately and see page 71 of this...

Basic components
30
port soon if the low battery voltage warning
device has activated. For charging the bat-
tery, consult your Yamaha dealer.
EMU31610Speed & fuel meter unit
This unit shows the boat speed and has the
functions of fuel meter, total fuel consumption
display, fuel economy display, fuel flow dis-
play, and system voltage display. If optional
sensors are connected to the unit, trip display,
water surface temperature display, depth dis-
play, and clock will be available. For the op-
tional...

Basic components
31
NOTE:
After the main switch is first turned on, all the
displays come on as a test. After a few sec-
onds, the gauge will change to normal opera-
tion.
NOTE:
The speed & fuel meter unit shows various
kinds of information according to the setting
made with the “” (set) and “” (mode)
buttons. For details, see the attached opera-
tion manual.
EMU31620Speedometer unit
This unit shows the boat speed and has func-
tions of fuel meter and system voltage dis-
play. If optional sensors are...

Basic components
32
EMU31630Fuel management meter
This meter has functions of fuel flow meter, to-
tal consumption display, fuel economy dis-
play, and remaining fuel display.
NOTE:
After the main switch is first turned on, all the
displays come on as a test. After a few sec-
onds, the gauge will change to normal opera-
tion.
NOTE:
The fuel management meter shows various
kinds of information when the operator uses
the “” (set) and “” (mode) buttons. For
details, see the attached operation manual....

Basic components
33
If the warning system has activated, stop the
engine and check the cooling water inlet for
clogging.
NOTE:
Dual engine drive users:
Should the overheat warning system of one
engine activate, the engine will slow down
and the buzzer will sound. This will cause the
other engine to slow down and the buzzer to
sound. To switch off the warning activation on
the engine not affected by overheating, turn
off the main switch of the engine overheating.
EMU26855Low oil pressure warning
If the...

Operation
34
EMU26901
Installation
CAUTION:
ECM00110
Incorrect engine height or obstructions to
smooth water flow (such as the design or
condition of the boat, or accessories such
as transom ladders or depth finder trans-
ducers) can create airborne water spray
while the boat is cruising. Severe engine
damage may result if the motor is operat-
ed continuously in the presence of air-
borne water spray.
NOTE:
During water testing check the buoyancy of
the boat, at rest, with its maximum load.
Check that...