Yamaha F115 Owners Manual

 
Basic components 
35
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 oper- 
ation.
NOTE:
 
The speedometer unit shows various kinds
of information according to the setting made
using the “” (set) and “” (mode) but-
tons. In addition, the speedometer can show
the desired unit of measurement such as km/
h, mph, or knots. For details, see the at- 
tached operation manual. 
EMU31630 
Fuel management meter 
This...

 
Basic components 
36 
ual. 
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 can- 
not be located and corrected. 
EMU30341 
Overheat 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 
 
Engine speed will automatically decrease
to 2000–3500 r/min. 
 
If equipped with an...

 
Basic components 
37 
on the engine not affected by overheating,
turn off the main switch of the engine over- 
heating. 
EMU30352 
Low oil pressure warning 
If the oil pressure drops too low, the warning
device will activate.
Activation of warning device 
 
Engine speed will automatically decrease
to 2000–3500 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...

 
38 
Operation 
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
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...

 
Operation 
39 
EMU26930 
Mounting height (boat bottom) 
To run your boat at optimum efficiency, the
water resistance (drag) of the boat and out-
board motor must be made as little as possi-
ble. The mounting height of the outboard
motor greatly affects the water resistance. If
the mounting height is too high, cavitation
tends to occur, thus reducing the propulsion;
and if the propeller tips cut the air, the engine
speed will rise abnormally and cause the en-
gine to overheat. If the mounting height is...

 
Operation 
40 
EMU27103 
Preoperation checks
WARNING
 
EWM00080  
If any item in the preoperation check is
not working properly, have it inspected
and repaired before operating the out-
board motor. Otherwise an accident 
could occur.
CAUTION:
 
ECM00120  
Do not start the engine out of water. Over-
heating and serious engine damage can 
occur. 
EMU31550 
Fuel 
 
Check to be sure you have plenty of fuel
for your trip. 
 
Make sure there are no fuel leaks or gaso-
line fumes. 
 
Check fuel line...

 
Operation 
41
NOTE:
 
Be sure to completely insert the dipstick into 
the dipstick guide. 
EMU30021 
Filling fuel
WARNING
 
EWM00060  
Gasoline and its vapors are highly flam-
mable and explosive. Keep away from
sparks, cigarettes, flames, or other 
sources of ignition. 
1. Remove the fuel tank cap.
2. Carefully fill the fuel tank.
3. Securely close the cap after filling the
tank. Wipe up any spilled fuel. 
EMU27270 
Ring Free Fuel Additive 
Gasoline is a precise blend of many different
substances,...

 
Operation 
42 
and drowsiness. Keep cockpit and cab-
in 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 pump, with the ar-
row pointing up, until you feel it become
firm. 
EMU27490 
Starting engine 
EMU27592 
Electric start / prime start models 
1. Place the gear shift lever...

 
Operation 
43 
4. Turn the main switch to “” (start),
and hold it for a maximum of 5 seconds.
5. Immediately after the engine starts, re-
lease the main switch and allow it to re-
turn to “” (on).
CAUTION:
 
ECM00191  
 
Never turn the main switch to “”
(start) while the engine is running. 
 
Do not keep the starter motor turning
for more than 5 seconds. If the starter
motor is turned continuously for more
than 5 seconds, the battery will be
quickly discharged, thus making it im-
possible to start...

 
Operation 
44 
gine stop switch.
WARNING
 
EWM00120  
 
Attach the engine stop switch lanyard
to a secure place on your clothing, or
your arm or leg while operating. 
 
Do 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. 
 
Avoid accidentally pulling the lanyard
during normal operation. Loss of en-
gine power means the loss of most
steering control. Also, without engine
power, the boat could slow...