Yamaha F 40 User Guide

							 
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. 
EMU25911 
Tiller handle 
To change direction, move the tiller handle to
the left or right as necessary. 
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. 
4. Shift
5. Fully closed
6. Throttle
7. Fully open
1. Neutral interlock trigger 
1. Fully open
2. Fully closed 
						

							 
Basic components 
16 
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. 
EMU25971 
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
 
EWM00031  
Do not overtighten the friction adjuster. If
there is too much resistance, it could be
difficult to move the remote control lever
or throttle grip, which could result in an 
accident. 
1. Forward “”
2. Neutral “”
3. Reverse “” 
1. Throttle indicator 
						

							 
Basic components 
17 
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.
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.
ZMU03169
 
1. Lanyard
2. Lock plate
1. Lock plate
2. Lanyard
1
2
ZMU03171 
						

							 
Basic components 
18 
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. 
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. 
EMU31430 
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
port side “A”.
To decrease resistance, turn the lever to the
starboard side “B”.
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.
ZMU04037
ON
START OFF
ZMU03590 
						

							 
Basic components 
19 
If the resistance does not increase even
when the lever is turned to the port side “A”,
make sure that the nut is tightened to the
specified torque.
NOTE:
 
 
Check the tiller handle for smooth move-
ment when the lever is turned to the star-
board side “B”. 
 
Do not apply lubricants such as grease to
the friction areas of the steering friction ad- 
juster. 
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. 
EMU26141 
Power trim and tilt switch on remote 
control or tiller handle 
The power trim and tilt system adjusts the
outboard motor angle in relation to the tran-
som. Pressing the switch “” (up) trims the
outboard motor up, then tilts it up. Pressing
the switch “” (down) tilts the outboard mo-
tor down and trims it down. When the switch
is released, the outboard motor will stop in its
current position.
NOTE:
 
For instructions on using the power trim and 
tilt switch, see pages 39 and 42. 
1. Nut 
Nut tightening torque:
3.7 Nm (2.7 ft-lb) (0.4 kgf-m)
ZMU02810
B
A
ZMU02908 
						

							 
Basic components 
20 
EMU26151 
Power trim and tilt switch on bottom 
engine cowling 
The power trim and tilt switch is located on
the side of the bottom engine cowling. Press-
ing the switch “” (up) trims the outboard
motor up, then tilts it up. Pressing the switch
“” (down) tilts the outboard motor down
and trims it down. When the switch is re-
leased, the outboard motor will stop in its
current position.
WARNING
 
EWM01030  
Use the power trim and tilt switch located
on the bottom engine cowling only when
the boat is at a complete stop with the en-
gine off. Attempting to use this switch
while the boat is moving could increase
the risk of falling overboard and could
distract the operator, increasing the risk
of collision with another boat or an obsta- 
cle.
NOTE:
 
For instructions on using the power trim and 
tilt switch, see page 42. 
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
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.
UP
DN
ZMU04038 
						

							 
Basic components 
21 
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. 
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 53. 
1. Trim tab
2. Bolt
1. Tilt lock lever
ZMU02822
1
2
A
B
1ZMU04039
 
1. Top cowling lock lever(s)
ZMU04040
1
ZMU04041 
						

							 
Basic components 
22 
EMU26302 
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 25. 
EMU26470 
Tachometer 
This gauge shows the engine speed and has
the following functions. 
EMU26491 
Digital tachometer 
The tachometer shows the engine speed
and has the following functions.
NOTE:
 
All segments of the display will light momen-
tarily after the main switch is turned on and 
will return to normal thereafter. 
1. Flushing device
1. Warning indicator
1
ZMU04042
1
ZMU04043
 
1. Tachometer
2. Warning indicator(s)
1. Tachometer
2. Trim meter
3. Hour meter
4. Low oil pressure warning indicator
5. Overheat warning indicator
6. Water separator warning indicator
7. Engine trouble warning indicator
8. Set button
9. Mode button
ZMU04578
1
2
1
52
4
3
76
89ZMU04185 
						

							 
Basic components 
23
NOTE:
 
The water separator and engine trouble
warning indicators only operate when the en-
gine is equipped with the appropriate func- 
tions. 
EMU26503 
Low oil pressure warning indicator 
If oil pressure drops too low, this indicator will
flash. For further information, see page 25.
CAUTION:
 
ECM00020  
 
Do not continue to run the engine if the
low oil pressure warning indicator is on
and the engine oil level is lower. Seri-
ous engine damage will occur. 
 
The low oil pressure warning indicator
does not indicate the engine oil level.
Use the oil dipstick to check the re-
maining oil quantity. For further infor- 
mation, see page 29. 
EMU26522 
Low oil pressure warning indicator 
If oil pressure drops too low, the warning in-
dicator will start to blink. For further informa-
tion, see page 25.
CAUTION:
 
ECM00020  
 
Do not continue to run the engine if the
low oil pressure warning indicator is on
and the engine oil level is lower. Seri-ous engine damage will occur. 
 
The low oil pressure warning indicator
does not indicate the engine oil level.
Use the oil dipstick to check the re-
maining oil quantity. For further infor- 
mation, see page 29. 
EMU26572 
Overheat warning indicator 
If the engine temperature rises too high, this
indicator will flash. For further information on
reading the indicator, see page 25.
CAUTION:
 
ECM00050  
Do not continue to run the engine if the
overheat warning indicator is on. Serious 
engine damage will occur.
ZMU04754
 
1. Low oil pressure warning indicator
ZMU017361
ZMU04715 
						

							 
Basic components 
24 
EMU26581 
Overheat warning indicator (digital 
type) 
If the engine temperature rises too high, the
warning indicator will start to blink. For fur-
ther information on reading the indicator, see
page 25.
CAUTION:
 
ECM00050  
Do not continue to run the engine if the
overheat warning indicator is on. Serious 
engine damage will occur. 
EMU26610 
Trim meter 
This gauge shows the trim angle of your out-
board motor.
NOTE:
 
Memorize the trim angles that work best for
your boat under different conditions. Adjustthe trim angle to the desired setting with the 
power trim and tilt switch. 
EMU26620 
Trim meter (digital type) 
This meter shows the trim angle of your out-
board motor.
NOTE:
 
 
Memorize the trim angles that work best
for your boat under different conditions.
Adjust the trim angle to the desired using
the power trim and tilt switch. 
 
If the trim angle of your motor exceeds the
trim operating range, the top segment on 
the trim meter display will blink. 
EMU26650 
Hour meter (digital type) 
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. 
1. Overheat warning indicator
ZMU01737
1
ZMU04581
ZMU01740