Yamaha 115 C Service Manual

E
2-20
EMD60010
TILT SUPPORT LEVER
To keep the outboard motor in the tilted-up
position, lock the tilt support lever to the
clamp bracket.
EMD63210
TOP COWLING LOCK LEVERS
V6
To remove the engine top cowling, pull up
the front and rear lock levers. Then lift off
the cowling. When replacing the cowling,
check to be sure it fits properly in the rubber
seal. Then lock the cowling again by mov-
ing the levers downward.
403033
301021
301022
V6
V6
301023
V4EMD64010
TOP COWLING RELEASE LEVER
V4
The top cowling...

E
2-21
2) Align the three cowling hooks with the
locks on the bottom cowling.
3) Press down on the top of the cowling at
the front and both sides of the back until
the three locks click.
4) To make sure the cowling is locked
properly push the cowling from each
side. If it lifts, repeat step 3.
cC
Make sure the cowling lock connection
cable is operating correctly before rein-
stalling the top cowling.
8When the release lever is operated,
both front and rear cowling hooks
should be released at the same...

E
2-22
EMD80010
WARNING SYSTEM
cC
Do not continue to operate the engine if
the warning device has activated. Con-
sult your Yamaha dealer if the problem
cannot be located and corrected.
EMU01476
OVERHEAT WARNING
This engine has an overheat warning
device. If the engine temperature rises too
high, the warning device will activate.
(1) ; Included  (-); N/A
If the warning system has been activated,
stop the engine and check the water inlet
for clogging.
* Not equipped on all models.
701054
605015
Activation...

E
2-23
EMD84012*
OIL LEVEL WARNING / OIL FILTER
CLOGGING WARNING
This engine has an oil level warning sys-
tem. 
If oil level falls below lower limit, the
warning device will activate.
(2); Included  (—); N/A
If the warning system has been activated,
stop the engine and check for the cause.
NOTE:
The warning for oil filter clogging is simi-
lar to the warnings for low oil level and
overheating.
For easy troubleshooting, it is advisable
to check for engine overheating first, then
oil level and finally oil...

E
EMF00010
Chapter 3
OPERATION
INSTALLATION........................................3-1
Mounting the outboard motor ............3-2
FILLING FUEL AND ENGINE OIL............3-4
Filling fuel ..............................................3-4
Filling oil ................................................3-5
PRE-OPERATION CHECK........................3-9
Operation after a long period of 
storage .................................................3-10
BREAKING IN ENGINE..........................3-11
STARTING ENGINE...

3-1
EMF10010
INSTALLATION
cC
Incorrect engine height or obstructions
to smooth water flow (such as the
design or condition of the boat or acce-
ssories such as transom ladders/depth
finder transducers) can create airborne
water spray while the boat is cruising.
Severe engine damage may result if the
motor is operated continuously in the
presence of airborne 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...

3-2
EMU00176
MOUNTING THE OUTBOARD
MOTOR
w
Improper mounting of the outboard
motor could result in hazardous condi-
tions such as poor handling, loss of con-
trol, or fire hazards. Observe the follow-
ing:
8The information presented in this sec-
tion is intended as reference only. It is
not possible to provide complete
instructions for every possible
boat/motor combination. Proper
mounting depends in part on experi-
ence and the specific boat/motor com-
bination.
8Your dealer or other person experi-...

3-3
w
Overpowering a boat may cause severe
instability. Do not install an outboard
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 manufac-
turer.
EMU01299
Mounting Height
To run your boat at optimum efficiency,
the water-resistance (drag) of the boat
and outboard motor must be made as lit-
tle as possible. The mounting-height of
the outboard motor greatly affects the
water-resistance. If the...

3-4
EMF30010
FILLING FUEL 
AND ENGINE OIL
FILLING FUEL
1) Remove the fuel tank cap.
2) Fill the fuel tank carefully.
3) Close the cap securely after refueling.
Wipe up any spilled fuel.
Ring Free Fuel Additive
Gasoline is a precise blend of many differ-
ent substances, each chosen to give certain
characteristics. Gasoline blends have been
changing in recent years in response to
concerns about pollution and resulting
emissions regulations. One of the most
obvious changes has been the elimination
of lead...

3-5
EMU01800
FILLING OIL
This engine uses the oil injection system,
which provides superior lubrication by
ensuring the proper oil ratio for all operat-
ing conditions. No fuel premixing is need-
ed (except during break-in). Simply pour
gasoline into the fuel tank and oil into the
oil tank. Convenient indicator segments
indicate the status of the oil supply. For
details on reading the indicator segments,
see “Oil level indicator” in this chapter.
To fill the engine oil tank, proceed as fol-
lows:
w
Do...