Yamaha 115 C Service Manual

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E
ON START OFF
701024
ON START OFF
701052
2) Turn on the main switch. The oil
injection system will automatically
feed oil from the remote oil tank to
the engine oil tank.
3) Turn the off main switch when the
engine oil tank is full.
4) Proceed to start the engine. Other-
wise the oil level warning system
may prevent the engine from revving
up.
cC
When the engine is operated for the first
time or stored for a period of time, a min-
imum of 5 liters (5.3 US qt, 4.4 Imp qt) of
oil should be kept in the remote oil tank.
Otherwise the oil-feed pump chamber
will not be filled with oil, and no oil will
be supplied.
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EMU01825
Using remote oil tank
150
1) Pour engine oil into the remote oil
tank.
NOTE:
The oil level lines on the remote oil tank
indicate the amount of additional oil that
can be added to the tank. The top oil level
line indicates approximately 1.9 L (0.5 US
gal, 0.4 Imp gal) can be added, and the
bottom oil level line indicates approxi-
mately 3.8 L (1 US gal, 0.8 Imp gal) can be
added.
2) Turn on the main switch. The oil
injection system will automatically
feed oil from the remote oil tank to
the engine oil tank.
3) Operate the engine normally.
cC
When the engine is operated for the first
time or stored for a period of time, a min-
imum of 5 liters (5.3 US qt, 4.4 Imp qt) of
oil should be kept in the remote oil tank.
Otherwise the oil-feed pump chamber
will not be filled with oil, and no oil will
be supplied.
ON START OFF
701024
001475
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3-8
1,500 cm3
(1.6 US qt,
1.31 Imp qt)
or less
EMU01543
Oil Level Indicator
The various oil level system functions are as follows:
Remarks Oil level indica-
tor (Digital
tachometer)Oil level indica-
tor (Analog
tachometer)Engine oil
tankRemote oil
tank
Green
Red Yellow Green
Yellow
RedMore than
300 cm
3
(0.32 US qt,
0.26 Imp qt)
300 cm
3
(0.32 US qt,
0.26 Imp qt)
or less More than
300 cm
3
(0.32 US qt,
0.26 Imp qt)
300 cm
3
(0.32 US qt,
0.26 Imp qt)
or lessMore than
1,500 cm
3
(1.6 US qt,
1.31 Imp qt)
More than
1,500 cm
3
(1.6 US qt,
1.31 Imp qt) 1,500 cm
3
(1.6 US qt,
1.31 Imp qt)
or less•No refilling necessary.
•Add oil, refer to 
“FILLING OIL.”
•Check oil filter for clogging.
•Check battery cable con-
nection.
•Buzzer will sound.
•Engine speed is automati-
cally reduced to about
2,000 r/min.
•Oil has not been added.
•Buzzer will sound.
•Engine speed is automati-
cally reduced to about
2,000 r/min.
•Refer to Chapter 5.
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3-9
EMF40110
PRE-OPERATION CHECK
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If any item in the pre-operation check is
not working properly, have it inspected
and repaired before operating the out-
board motor. Otherwise, an accident
could occur.
Fuel
Check to be sure you have plenty of fuel
for your trip. Make sure there are no fuel
leaks or gasoline fumes.
Be sure the fuel hose is not being flattened
or kinked by objects in the boat, and that
there are no sharp objects near it.
Oil
Check to be sure you have plenty of oil for
your trip.
Controls
Check throttle, shift, and steering for prop-
er operation before starting the engine.
The controls should work smoothly, with-
out binding or unusual free play. Look for
loose or damaged connections.
Check operation of the starter and stop
switches when the outboard moter is in
the water.
Engine
Check the engine and engine mounting.
Look for loose or damaged fasteners.
Check the propeller for damage.
cC
Do not start the engine out of water.
Overheating and serious engine damage
can occur.
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3-10
EMU01790
OPERATION AFTER A LONG PERIOD
OF STORAGE
When operating the engine after a long
period (12 months) of storage, proceed as
follows:
1) Use a 50:1 gasoline-oil mixture to
start the engine.
2) Start the engine. Leave it idling.
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8Do not touch or remove electrical parts
when starting or during operation.
8Keep hands, hair, and clothes away
from the flywheel and other rotating
parts while the engine is running.
3) Watch for oil flowing through the oil
feed pipes. After any air in the oil
lines has been expelled, the oil injec-
tion system should supply oil normal-
ly. If no oil is flowing after 10 minutes
of idling, consult your Yamaha dealer.
cC
Be sure to take the above steps when
operating the engine after a long period
of storage. Otherwise engine seizure
could occur.
212012
212013
V4
V6
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3-11
EMU01776
BREAKING IN ENGINE
Your new engine requires a period of
break-in to allow mating surfaces of mov-
ing parts to wear in evenly. Correct break-
in will help ensure proper performance
and longer engine life.
cC
8Failure to follow the break-in procedure
could result in reduced engine life or
even severe engine damage.
8Premix fuel must be used during break-
in, in addition to oil in the oil injection
system.
Break-in time: 10 hours
Gasoline to engine oil premix ratio
during break-in: 50:1
EMU00225
Gasoline (petrol)/Engine oil mixing chart
cC
Make sure to mix gasoline (petrol) and oil
completely, otherwise your outboard
motor may be damaged.
Mixing ratio50:1
Gasoline (Petrol)
Engine oil0.48 L
(0.51 US qt,
0.42 Imp qt)24 L
(6.3 US gal,
5.3 Imp gal)
0.28 L
(0.30 US qt,
0.25 Imp qt)14 L
(3.7 US gal,
3.1 Imp gal)
0.24 L
(0.25 US qt,
0.21 Imp qt)12 L
(3.2 US gal,
2.6 Imp gal)
0.02 L
(0.02 US qt,
0.02 Imp qt)1 L
(0.26 US gal,
0.22 Imp gal)
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3-12
EMU01784
Run the engine under load (in gear with a
propeller installed) as follows.
1) First 10 minutes:
Run the engine at the lowest possi-
ble-speed. A fast idle in neutral is
best.
2) Next 50 minutes:
Do not exceed half throttle (approxi-
mately 3,000 r/min). Vary engine
speed occasionally. If you have an
easy-planing boat, accelerate at full
throttle onto plane, then immediately
reduce the throttle to 3,000 r/min or
less.
3) Second hour:
Accelerate at full throttle onto plane,
then reduce engine speed to three-
quarter throttle (approximately 4,000
r/min). Vary engine speed occasional-
ly. Run at full throttle for one minute,
then allow about 10 minutes of opera-
tion at three-quarter throttle or less to
let the engine cool.
4) Third through tenth hours:
Avoid operating at full throttle for
more than 5 minutes at a time. Let the
engine cool between full-throttle runs.
Vary engine speed occasionally.
5) After the first 10 hours:
Operate the engine normally. Use
only straight gasoline in the fuel tank.
The oil injection system provides
proper lubrication for normal opera-
tion.
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001671
EMU01197
STARTING ENGINE
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8Before starting the engine, make sure
that the boat is tightly moored and that
you can steer clear of any obstructions.
Be sure there are no swimmers in the
water near you.
8When the air vent screw is loosened,
gasoline (petrol) vapor will be released.
Gasoline (petrol) is highly flammable,
and its vapors are flammable and
explosive. Refrain from smoking, and
keep away from open flames and
sparks while loosening the air vent
screw.
8This product emits exhaust gases
which contain carbon monoxide, a col-
orless, odorless gas which may cause
brain damage or death when inhaled.
Symptoms include nausea, dizziness,
and drowsiness. Keep cockpit and
cabin areas well ventilated. Avoid
blocking exhaust outlets.
1) If there is an air vent screw on the fuel
tank cap, loosen it 2 or 3 turns.
2) If there is a fuel joint or a fuel cock on
the boat, firmly connect the fuel line
to the joint or open the fuel cock.
3) Squeeze the primer bulb with the out-
let end up until you feel it become
firm.
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EMU00248
PROCEDURE FOR REMOTE
CONTROL MODEL
4) Place the remote control lever in the
Neutral position.
NOTE:
The start-in-gear protection device per-
mits the engine to be started only when it
is in Neutral.
N
701015
000293
5) Attach the engine stop switch lanyard
to a secure place on your clothing, or
your arm or leg. Then, install the lock
plate on the other end of the lanyard
in the engine stop switch.
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8Attach the engine stop switch lanyard
to a secure place on your clothing, your
arm or leg while operating.
8Do not attach the lanyard to clothing
that could tear loose. Do not route the
lanyard where it could become entan-
gled, preventing it from functioning.
8Avoid accidentally pulling the lanyard
during normal operation. Loss of
engine power means the loss of most
steering control. Also, without engine
power, the boat could slow rapidly.
This could cause people and objects in
the boat to be thrown forward.
6) Turn the main switch to “ON”.
NOTE:
In case of dual-engine operation, when
the main switch is turned on, the buzzer
operates for a few seconds and stops
automatically. Should either of the dual
engines stall, the buzzer operates.ON
START OFF
701045
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8) Press in and hold the main switch to
operate the remote choke
system.(The remote choke switch
returns to its home position when
you release your hand. Therefore,
keep the switch pressed in.)
NOTE:
8It is not necessary to use the choke
when the engine is warm.
8Set the choke knob to the home posi-
tion, or the remote choke system will
not operate.
9) Turn the main switch to “START”,
and hold it for a maximum of 5 sec-
onds.
10) Immediately after the engine starts,
release the main switch to return it to
“ON”.
ON
START OFF
701056
START OFFON
701041
3-15
N
701014
EMU00948
Electric Start Model
7) Open the throttle slightly without
shifting using the neutral throttle
lever or the free accelerator.
After the engine starts, return the
throttle to the original position.
NOTE:
The rotation angle of the neutral throttle
lever or the free accelerator should be
determined upon the engine temperature.
When the engine is cold, it is necessary to
rotate the lever a little farther.
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