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 liter or
gallon when cruising, and is only for reference
use by the operator.
Press the “” (mode) button repeatedly
until the indicator on the face of the gauge
points to “” (economy).
NOTE:
If twin engines are installed on your boat, the
gauge will only display the total fuel economy
of both engines.
NOTE:

Fuel consumption varies greatly with boat
design, weight, propeller used, engine trim
angle, sea conditions (including wind), and
throttle position. Fuel consumption also var-
ies slightly with the type of water (salt, fresh,
and contaminate levels), air temperature
and humidity, cleanliness of the boat bot-
tom, engine mounting height, skill of the op-
erator, and individual gasoline formulation
(winter or summer fuel and amount of addi-
tives).

The Yamaha digital speedometer and fuel
management meter calculates speed,
miles traveled, and fuel economy by water
movement at the stern of the boat. This dis-
tance can vary greatly from the actual dis-
tance traveled because of water currents,
sea swells, and the condition of the water
speed sensor (partially plugged or dam-
aged).

Individual engines may slightly vary in their
fuel consumption due to manufacturing
variations. These variations can be even
greater if the engines are of different year
models. In addition, variations in propellers,
1. Selector switch
ZMU01751
ZMU01752
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							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 while cruising, they can be synchro-
nized by adjusting trim angle or throttle.
EMU26791Water separator warning indicator
This indicator will blink when water has accu-
mulated in the water separator. In such an
event, stop the engine and drain the water
from the separator.
NOTE:
This indicator only operates when a water
separator sensor is equipped.
EMU31640Command link multifunction meters
Command link multifunction meters have 6
kinds of meter units; tachometer unit (square
or round types), speedometer unit (square
type), speed & fuel meter unit (square or
round types), and fuel management meter
(square type). The indicator system is slightly
different between the round and square types.
Check the model and type of your unit careful-
ly. This manual describes mainly the warning
indicators. For more details on setting meters
or changing indicator systems, see the at-
tached operation manual.
1. Port engine speed is higher
2. Port engine speed is slightly higher
3. Engine speed is synchronized evenly be-
tween port and starboard engines
4. Starboard engine speed is slightly higher
5. Starboard engine speed is higher
ZMU01753
ZMU01754
1
2
3
4
5ZMU01755
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							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 Yamaha dealer. The tachometer unit is
available in round or square types. Check
your tachometer unit type.
NOTE:
The tachometer unit shows various kinds of
information according to the setting made us-
ing the “” (set) and “” (mode) buttons.
For details, see the attached operation manu-
al.
1. Set button
2. Mode button
1. Tachometer
2. Trim meter
3. Multifunction display
4. Cooling water pressure
5. Cooling water/engine temperature
2
1
ZMU05415
2
3 145
67
8
ZMU05416
6. Water detection warning indicator
7. Battery voltage
8. Oil pressure (4-stroke models)
1. Set button
2. Mode button
1. Tachometer
2. Trim meter
3. Multifunction display
4. Water detection warning indicator
5. Engine trouble warning/maintenance indica-
tor
6. Cooling water pressure
7. Oil pressure (4-stroke models)
8. Cooling water/engine temperature
9. Battery voltage
2 1
ZMU05417
1452
3
6879ZMU05418
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							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 indicator will start
to blink, and the engine speed will automati-
cally decrease to about 2000 r/min.
Stop the engine immediately if the buzzer
sounds and the low oil pressure warning indi-
cator blinks. Check the engine oil quantity and
replenish oil if necessary. If the warning de-vice has activated while the appropriate en-
gine oil quantity is maintained, consult your
Yamaha dealer.
CAUTION:
ECM01600
Do not continue to run the engine if the
low oil pressure warning device has acti-
vated. Serious engine damage will occur.
Overheat warning
If the engine temperature rises too high while
cruising, the overheat warning indicator will
start to blink. The engine speed will automati-
cally decrease to about 2000 r/min.
Stop the engine immediately if the buzzer
sounds and the overheat warning device has
activated. Check the cooling water inlet for
clogging.
ZMU05430
ZMU05431
ZMU05421
ZMU05422
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							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
manual to drain the water from the fuel filter.
Get back to the port soon and consult a
Yamaha dealer immediately.
CAUTION:
ECM00910
Gasoline mixed with water could cause
damage to the engine.
Engine trouble warning
This indicator will blink when the engine mal-
functions while cruising. Get back to the port
soon and consult a Yamaha dealer immedi-
ately.
CAUTION:
ECM00920
In such an event, the engine will not oper-
ate properly. Consult a Yamaha dealer im-
mediately.
Low battery voltage warning
When the battery voltage drops, the low bat-
tery voltage warning indicator and the battery
voltage value will start to blink. Get back to the
ZMU05423
ZMU05424
ZMU05425
ZMU05426
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							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 sensor, consult your Yamaha dealer.
The speed & fuel meter unit is available in
round or square types. Check your speed &
fuel meter unit type.
ZMU05427
ZMU05428
1. Set button
2. Mode button
1. Speedometer
2. Fuel meter
3. Multifunction display
1. Set button
2. Mode button
2
1
ZMU05432
1
2
3
ZMU05433
2 1
ZMU05434
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							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 connected to the
unit, trip display, water surface temperature
display, depth display, and clock will be avail-
able. For the optional sensor, consult your
Yamaha dealer.
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 speedometer unit shows various kinds of
information according to the setting made us-
ing the “” (set) and “” (mode) buttons.
In addition, the speedometer can show the
desired unit of measurement such as km/h,
mph, or knots. For details, see the attached
operation manual.
1. Speedometer
2. Fuel meter
3. Multifunction display
12
3
ZMU05435
1. Set button
2. Mode button
1. Speedometer
2. Fuel meter
3. Multifunction display
2
1
ZMU05436
1
2
3
ZMU05437
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							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.
EMU26801
Warning system
CAUTION:
ECM00090
Do not continue to operate the engine if a
warning device has activated. Consult
your Yamaha dealer if the problem cannot
be located and corrected.
EMU26824Overheat 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

The engine speed will automatically de-
crease to about 2000 r/min.

If equipped with an overheat warning indi-
cator, it will light or blink.

The buzzer will sound.
1. Set button
2. Mode button
1. Fuel flow meter
2. Multifunction display
2
1
ZMU05438
1
2
ZMU05439
ZMU01757
ZMU04583
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							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 oil pressure drops too low, the warning
device will activate.
Activation of warning device

The engine speed will automatically de-
crease to about 2000 r/min.

The low oil pressure warning indicator will
light or blink.

The buzzer will sound.
If the warning system has activated, stop the
engine as soon as it is safe to do so. Check
the oil level and add oil as needed. If the oil
level is correct and the warning device does
not switch off, consult your Yamaha dealer.
CAUTION:
ECM00100
Do not continue to run the engine if the
low oil pressure warning indicator is on.
Serious engine damage could occur.
OFF STARTONOFF STARTON
ZMU04584
ZMU01828
ZMU04583
OFF STARTONOFF STARTON
ZMU04584
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							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 the static water level on the ex-
haust housing is low enough to prevent water
entry into the powerhead, when water rises
due to waves when the outboard is not run-
ning.
EMU31790Mounting the outboard motor
WARNING
EWM00820

Overpowering a boat could cause se-
vere instability. Do not install an out-
board motor with more horsepower than
the maximum rating on the capacity
plate of the boat. If the boat does not
have a capacity plate, consult the boat
manufacturer.

The information presented in this sec-
tion is intended as reference only. It is
not possible to provide complete in-
structions for every possible boat and
motor combination. Proper mounting
depends in part on experience and the
specific boat and motor combination.
WARNING
EWM01520
Improper mounting of the outboard motor
could result in hazardous conditions such
as poor handling, loss of control, or fire
hazards. Observe the following:

For permanently mounted models, your
dealer or other person experienced in
proper rigging should mount the motor.
If you are mounting the motor yourself,
you should be trained by an experienced
person.
Mount the outboard motor on the center line
(keel line) of the boat, and ensure that the
boat itself is well balanced. Otherwise the
boat will be hard to steer. For boats without a
keel or which are asymmetrical, consult your
dealer.
1. Center line (keel line)
1. Center line (keel line)
ZMU017601
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