Yamaha 115 C Service Manual

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2-10
001082
001049
q
tw
u
y
e
r
001078
EMU01614
DIGITAL TACHOMETER
This gauge contains the tachometer, trim
meter, hour meter, oil level indicator, and
the overheat warning indicator.
1Tachometer
2Trim meter
3Hour meter
4Oil level indicator
5Overheat warning indicator
6Set button
7Mode button
NOTE:
All segments of the display will light
momentarily after the main switch is
turned on and will return to normal there-
after.
EMU00136
Tachometer
This meter shows the engine speed.
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2-11
001087
EMU01620
Hour Meter
This meter shows the number of hours
the engine has been run. It can be set to
show the total number of hours or the
number of hours for the current trip. The
display can also be turned on and off.
8Changing the display format
Pressing the MODE button changes the
display format in the following circular pat-
tern:
Total hours - Trip hours - Display off
8Resetting the trip hours
Simultaneously pressing the SET and
MODE buttons for more than 1 second
while the trip hours are displayed resets
the trip counter to 0 (zero).
NOTE:
The total number of hours the engine has
been run cannot be reset.
EMU01109
Trim Meter
This meter shows the trim angle of your
outboard motor.
NOTE:
8Memorize the trim angles that work
best for your boat under different condi-
tions. Adjust the trim angle to the
desired setting by operating the power
trim and tilt switch.
8If the trim angle of your motor exceeds
the trim operating range, the top seg-
ment on the trim meter display will start
to blink.
001050
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2-12
001051q
001052
q
EMU01553
Overheat Warning Indicator
If the engine temperature rises too high,
the warning indicator will start to blink.
Refer to “OVERHEAT WARNING” for
details.
1Overheat warning indicator
cC
Do not continue to operate the engine if a
warning device has activated. If neces-
sary, refer to the “TROUBLESHOOTING”
section in this manual. Consult your deal-
er if the problem cannot be located and
corrected.
EMU00138
Oil-Level Indicator
This indicator shows the engine oil level.
If the oil level falls below the lower limit,
the warning indicator will start to blink.
Refer to the sections “FILLING OIL” and
“OIL LEVEL WARNING” for details.
1Oil-level indicator
cC
Do not operate the engine without oil.
Serious engine damage will occur.
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2-13
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802023*
EMD25110
Speedometer
The meter will show the boat speed.
NOTE:
The speedometer displays km/h, mph, or
knots, depending upon operator prefer-
ence. Select the desired unit of measure-
ment by setting the selector switch on the
back of the meter. See the illustration for
setting.
1Cap
2Selector switch (For speed unit)
3Selector switch (For fuel sender)
802034
TRIP TIME BATT
Km/h
knot
mph
km
mileSPEEDYAMAHA
set
mode
802016*
TRIP TIME BATT
Km/h
knot
mph
km
mileSPEEDYAMAHA
set
mode
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EMD40012
DIGITAL SPEEDOMETER
This meter contains the speedometer, fuel
meter with warning, trip meter, clock and
voltmeter with warning.
1Speedometer
2Fuel meter
3Trip meter/clock/voltmeter
4Warning indicator
NOTE:
After the main switch is first turned on, all
portions of the meter come on as a check.
After a few seconds, the meters will
change to normal operation. Watch the
meter when turning on the main switch to
make sure all segments come on.
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2-14
802024
TRIP TIME BATT
Km/h
knot
mph
km
mileSPEEDYAMAHA
set
mode
EMU01274
Trip Meter
This meter displays the distance the boat
has traveled since the meter was last
reset.
Repeatedly push and release the “mode”
button until the indicator on the face of
the meter points to “TRIP”. To reset the
trip meter to “0”, press the “set” and
“mode” button together.
NOTE:
8The trip distance is shown in kilometers
or miles depending upon the unit of
measurement selected for the
speedometer.
8The trip distance is kept in memory by
battery power. The stored data will be
lost if the battery is disconnected.
802025
TRIP TIME BATT
Km/h
knot
mph
km
mileSPEEDYAMAHA
set
mode
EMU01275
Clock
This meter shows the current time.
Repeatedly push and release the “mode”
button until the indicator on the face of
the meter points to “TIME.” To set the
clock, be sure the meter is in the “TIME”
mode. Press the “set” button; the hour
display will begin blinking. Press the
“mode” button until the desired hour is
displayed. Press the “set” button again,
the minute display will begin blinking.
Press the “mode” button until the desired
minute is displayed. Press the “set” but-
ton again to start the clock.
NOTE:
The clock operates on battery power. Dis-
connecting the battery will stop the clock.
Reset the clock after connecting the bat-
tery.
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EMD40410
Warning indicator
8Fuel warning
If the fuel level decreases to one segment
the fuel level warning segment 1begins
blinking.
8Low battery voltage warning
If battery voltage drops, the display 2will
be automatically turned on and it begins
blinking.
cC
Do not continue to operate the engine if a
warning device has activated. Refer to
the TROUBLESHOOTING section in this
manual. Consult a Yamaha dealer if the
problem cannot be located and corrected.
802031
TRIP TIME BATT
Km/h
knot
mph
km
mileSPEEDYAMAHA
set
mode
q w
802026TRIP TIME BATT
Km/h
knot
mph
km
mile
SPEED
q w
EMD40310
Fuel meter
The fuel level is displayed by eight seg-
ments. When all segments are showing,
the fuel is full.
cC
The Yamaha fuel tank sensor is different
from a conventional-type sensor. A
wrong setting of the selector switch on
the meter will give incorrect readings.
Consult Yamaha dealer for correct set-
ting.
NOTE:
The fuel reading can be affected by the
position of the sensor in the fuel tank and
the attitude of the boat in the water. Oper-
ation with bow-up trim or continuous
turning can give false readings.
802032TRIP TIME BATT
Km/h
knot
mph
km
mile
SPEED
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YAMAHA
set
mode
P Smpg Km/Lgph
I/h
ECON SYNC TTL
FUEL MANAGEMENT
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EMD42012
FUEL MANAGEMENT METER
Optional equipment
The meter contains the fuel flow meter,
fuel consumption meter, fuel economy
meter, twin engine speed synchronizer,
water separator warning indicator.
1Fuel flow meter
2Fuel consumption/Fuel economy
meter/Twin engine speed synchronizer
3Water separator warning indicator
(Operates only if the sensor has been
installed.)
NOTE:
After the main switch is first turned on, all
portions of the meter come on as a check.
After a few seconds, the meters will
change to normal operation. Watch the
meter when turning on the main switch to
make sure all segments come on.
802021TRIP TIME BATT
Km/h
knot
mph
km
mile
SPEED
YAMAHA
P SgphI/h
ECON SYNC TTL
FUEL MANAGEMENT
set
mode
EMD32010
Fuel flow meter
The meter displays fuel flow within one
hour, at the rate of current engine opera-
tion.
If twin engines are installed on your boat,
the meter will display total fuel flow of
Port and Starboard side engine. It also
displays PS indication at the same time.
By pressing “set” button, the meter will
display fuel flow of starboard side engine
and S indication.
By pressing “set” button again, the meter
will display fuel flow of port side engine
and P indication.
By pressing “set” button again, the meter
will display total fuel flow.
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P Smpg Km/L
gph
I/h
ECON SYNC TTL
FUEL MANAGEMENT
EMU01277
Fuel Economy
This meter displays the distance per liter
or gallon when cruising for reference use
by the operator.
Repeatedly push and release the “mode”
button until the indicator on the face of
the meter points to “ECON.”
NOTE:
If twin engines are installed on your boat,
the meter will display only the total fuel
economy of both engines.
P Smp Kmgph
I/h
ECON SYNC TTL
FUEL MANAGEMENT
/L
g
EMU01276
Fuel Consumption Meter
This meter displays the total amount of
fuel consumed since the meter was last
reset.
Repeatedly push and release the “mode”
button until the indicator on the face of
the meter points to total (“TTL”). To reset
the total fuel consumption to “0”, press
the “set” and “mode” buttons together.
NOTE:
8The meter displays gallon/hour and liter
depending upon operator preference.
Select the desired unit of measurement
by setting the selector switch 1on the
back of the meter during installation. 
8Fuel consumption meter and Fuel econ-
omy meter will indicate same unit of
measurement.
26 5 4 3 1
ON
(liter)l/h
(gallon)gph
q
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NOTE:
8Fuel consumption varies greatly with
boat design, weight, propeller used,
engine trim angle, sea conditions
(including wind), and throttle position.
Fuel consumption also varies slightly
with the type of water (salt, fresh, and
contaminate levels), air temperature
and humidity, cleanliness of the boat
bottom, engine mounting height, skill of
the operator, and individual gasoline
formulation (winter or summer fuel and
amount of additives).
8The Yamaha digital speedometer and
fuel management meter calculates
speed, miles traveled, and fuel econo-
my by water movement at the stern of
the boat. This distance can vary greatly
from the actual distance traveled
because of water currents, sea swells,
and the condition of the water speed
sensor (partially plugged or damaged).
8Individual engines may slightly vary in
their fuel consumption due to manufac-
turing variations. These variations can
be even greater if the engines are of dif-
ferent year models. In addition, varia-
tions in propellers, even of the same
basic dimensions of the same design,
can also cause a slight variation in fuel
consumption.
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EMU01278
Twin Engine Speed Synchronizer
This meter displays the difference in
engine speed (r/min) between the Port
and Starboard engines for reference pur-
poses when synchronizing the two
engines’ speeds.
Repeatedly push and release the “mode”
button until the indicator on the face of
the meter points to “SYNC”.
1Port side engine speed is higher
2Port side engine speed is slightly higher
3Engine speed is synchronized evenly
between Port and Starboard side engines
4Starboard side engine speed is slightly
higher
5Starboard side engine speed is higher
NOTE:
If the two engines’ speeds are not syn-
chronized while cruising, they can be syn-
chronized by adjusting trim angle or
throttle.
P Smpg Km/Lgph
I/h
ECON SYNC TTL
FUEL MANAGEMENT
q
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t
P Smpg Km/Lgph
I/h
ECON SYNC TTL
FUEL MANAGEMENT
EMU01207
Water Separator Warning Indicator
If the water which has been separated
from fuel in the water trap exceeds a spe-
cific volume, the indicator will blink show-
ing the need for water to be drained.
NOTE:
This indicator only operates when a water
separator sensor is equipped.
P Smpg Km/Lgph
I/h
ECON SYNC TTL
FUEL MANAGEMENT
000341
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