Yamaha F 15 Owners Manual

							 
Basic components 
15 
EMU26201 
Neutral interlock trigger 
To shift out of neutral, first pull the neutral in-
terlock trigger up. 
EMU26211 
Neutral throttle lever 
To open the throttle without shifting into ei-
ther forward or reverse, put the remote con-
trol lever in the neutral position and lift the
neutral throttle lever.
NOTE:
 
The neutral throttle lever will operate only
when the remote control lever is in neutral.
The remote control lever will operate only
when the neutral throttle lever is in the closed 
position. 
EMU26221 
Choke switch 
To activate the choke system, press in the
main switch while the key is turned to the
“” (on) or “” (start) position. The
choke system will then supply the rich fuel
mixture required to start the engine. When
the key is released, the choke will switch off
automatically. 
EMU25911 
Tiller handle 
To change direction, move the tiller handle to
the left or right as necessary. 
6. Throttle
7. Fully open
1. Neutral interlock trigger 
1. Fully open
2. Fully closed
ZMU03160 
						

							 
Basic components 
16 
EMU25922 
Gear shift lever 
Pulling the gear shift lever towards you puts
the engine in forward gear so that the boat
moves ahead. Pushing the lever away from
you puts the engine in reverse gear so that
the boat moves astern. 
EMU25941 
Throttle grip 
The throttle grip is on the tiller handle. Turn
the grip counterclockwise to increase speed
and clockwise to decrease speed. 
EMU25961 
Throttle indicator 
The fuel consumption curve on the throttle
indicator shows the relative amount of fuel
consumed for each throttle position. Choose
the setting that offers the best performance
and fuel economy for the desired operation. 
1. Forward “”
2. Neutral “”
3. Reverse “”
ZMU01997
ZMU04879
ZMU01998
2
1
3
2 N R
F
 
1. Forward “”
2. Neutral “”
3. Reverse “”
ZMU04878
2
3
1 N
R
F
ZMU01999 
						

							 
Basic components 
17 
EMU25970 
Throttle friction adjuster 
A friction device provides adjustable resis-
tance to movement of the throttle grip or the
remote control lever, and can be set accord-
ing to operator preference.
To increase resistance, turn the adjuster
clockwise. To decrease resistance, turn the
adjuster counterclockwise.
WARNING
 
EWM00030  
Do not overtighten the friction adjuster. If
there is too much resistance, it could be
difficult to move throttle lever or grip, 
which could result in an accident. 
When constant speed is desired, tighten the
adjuster to maintain the desired throttle set-
ting. 
EMU25990 
Engine stop lanyard switch 
The lock plate must be attached to the en-
gine stop switch for the engine to run. The
lanyard should be attached to a secure place
on the operator’s clothing, or arm or leg.
Should the operator fall overboard or leave
the helm, the lanyard will pull out the lock
plate, stopping ignition to the engine. This
will prevent the boat from running away un-
der power.
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 rapidly. This
could cause people and objects in the 
boat to be thrown forward. 
1. Throttle indicator
ZMU02000
1
ZMU02001 
						

							 
Basic components 
18
NOTE:
 
The engine cannot be started with the lock 
plate removed. 
EMU26001 
Engine stop button 
To open the ignition circuit and stop the en-
gine, push this button. 
EMU26011 
Choke knob for pull type 
To supply the engine with the rich fuel mix-
ture required to start, pull out this knob. 
EMU26070 
Manual starter handle 
To start the engine, first gently pull the han-
dle out until resistance is felt. From that posi-
tion, then pull the handle straight out quickly
to crank the engine. 
1. Lanyard
2. Lock plate
1. Lanyard
2. Lock plate
2
1
ZMU02003
ZMU02083
ZMU02355
ZMU02005 
						

							 
Basic components 
19 
EMU26080 
Starter button 
To start the engine with the electric starter,
push the starter button. 
EMU26090 
Main switch 
The main switch controls the ignition system;
its operation is described below. 
 
“”  
(off) 
With the main switch in the “” (off) posi-
tion, the electrical circuits are off, and the key
can be removed. 
 
“”  
(on) 
With the main switch in the “” (on) posi-
tion, the electrical circuits are on, and the key
cannot be removed. 
 
“”  
(start) 
With the main switch in the “” (start) po-
sition, the starter motor turns to start the en-
gine. When the key is released, it returns
automatically to the “” (on) position. 
EMU26102 
Power tilt switch 
The power tilt system adjusts the outboard
motor angle in relation to the transom. Push-
ing the switch “” (up) tilts the outboard mo-
tor up. Pressing the switch “” (down) tilts
the outboard motor down. When the switch is
released, the outboard motor will stop in its
current position.
NOTE:
 
For instructions on using the power tilt
ZMU04880
ZMU02811
UP
DN
DN
UPZMU04899 
						

							 
Basic components 
20 
switch, see pages 38 and 41. 
EMU26110 
Steering friction adjuster 
A friction device provides adjustable resis-
tance to the steering mechanism, and can be
set according to operator preference. An ad-
juster lever is located on the bottom of the
tiller handle bracket.
To increase resistance, turn the lever to the
left.
To decrease resistance, turn the lever to the
right.
WARNING
 
EWM00040  
Do not overtighten the friction adjuster. If
there is too much resistance, it could be
difficult to steer, which could result in an 
accident. 
EMU26122 
Steering friction adjuster 
A friction device provides adjustable resis-
tance to the steering mechanism, and can be
set according to operator preference. An ad-
justing screw or bolt is located on the swivel
bracket.To increase resistance, turn the adjuster
clockwise.
To decrease resistance, turn the adjuster
counterclockwise.
WARNING
 
EWM00040  
Do not overtighten the friction adjuster. If
there is too much resistance, it could be
difficult to steer, which could result in an 
accident. 
EMU26241 
Trim tab with anode 
The trim tab should be adjusted so that the
steering control can be turned to either the
right or left by applying the same amount of
force.
WARNING
 
EWM00840  
An improperly adjusted trim tab could
cause difficult steering. Always test run
after the trim tab has been installed or re-
placed to be sure steering is correct. Be
sure you have tightened the bolt after ad- 
justing the trim tab. 
If the boat tends to veer the left (port side),
turn the trim tab rear end to the port side “A”
in the figure. If the boat tends to veer the right
(starboard side), turn the trim tab end to the
ZMU02340
ZMU02080 
						

							 
Basic components 
21 
starboard side “B” in the figure.
CAUTION:
 
ECM00840  
The trim tab also serves as an anode to
protect the engine from electrochemical
corrosion. Never paint the trim tab as it 
will become ineffective as an anode. 
EMU26261 
Trim rod (tilt pin) 
The position of the trim rod determines the
minimum trim angle of the outboard motor in
relation to the transom. 
EMU26312 
Tilt lock mechanism 
The tilt lock mechanism is used to prevent
the outboard motor from lifting out of the wa-
ter when in reverse gear.To lock it, set the tilt lock lever in the “”
(lock) position. To release, push the tilt lock
lever in the “” (release) position. 
EMU26320 
Tilt support knob 
To keep the outboard motor in the tilted up
position, push the tilt support knob under the
swivel bracket. 
EMU26330 
Tilt support bar 
The tilt support bar keeps the outboard motor
in the tilted up position. 
1. Trim tab
2. Bolt
A
B
ZMU03097
1
2
ZMU02007
 
1. Tilt lock lever
ZMU020081
ZMU04884 
						

							 
Basic components 
22 
EMU26360 
Power tilt unit 
This unit tilts the outboard motor up and
down and is controlled with the power tilt
switch.
CAUTION:
 
ECM00630  
Do not step on or exert pressure on the
power tilt motor. The power tilt unit could 
be damaged as a result. 
EMU26372 
Top cowling lock lever(s) (turn type) 
To remove the engine top cowling, turn the
lock lever(s) and lift off the cowling. When in-
stalling the cowling, check to be sure it fits
properly in the rubber seal. Then lock the
cowling again by returning the lever(s) to the
lock position. 
EMU26460 
Flushing device 
This device is used to clean the cooling wa-
ter passages of the motor using a garden
hose and tap water.
NOTE:
 
For details on usage, see page 54. 
EMU26300 
Warning indicator 
If the engine develops a condition which is
cause for warning, the indicator lights up. For
details on how to read the warning indicator,
see page 23. 
1. Power tilt unit
2. Power tilt motor
ZMU02078
 
1. Top cowling lock lever(s)
1. Flushing device
ZMU02009
1
1
ZMU04885 
						

							 
Basic components 
23 
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. 
EMU26813 
Overheat warning 
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. 
 
The overheat warning indicator will light (if
equipped on the bottom cowling or the ta-
chometer). 
 
The buzzer will sound (if equipped on the
tiller handle, remote control box, or main
switch panel).If the warning system has activated, stop the
engine and check the cooling water inlet for
clogging. 
EMU30164 
Low 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.
ZMU02010
ZMU03026 
						

							 
Basic components 
24 
 
The buzzer will sound (if equipped on the
tiller handle, remote control box, or main
switch panel).
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.
ZMU02081
ZMU02360