Yamaha F150 Four Stroke Manual

							Basic components
14
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.
EMU26232Free accelerator
To open the throttle without shifting into either
forward or reverse, push the free accelerator
button and move the remote control lever.
NOTE:

The free accelerator button can only be
used when the remote control lever is in the
neutral position.

After the button is pushed, the throttle be-
gins to open after the remote control lever is
moved at least 35°.

After using the free accelerator, return the
remote control lever to the neutral position.
The free accelerator button will return auto-
matically to its set position. The remote con-
trol will then engage forward and reverse
normally.
EMU25970Throttle 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.
1. Fully open
2. Fully closed
1. Fully open
2. Fully closed
3. Free accelerator
132
ZMU04575
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							Basic components
15
When constant speed is desired, tighten the
adjuster to maintain the desired throttle set-
ting.
EMU25990Engine stop lanyard switch
The lock plate must be attached to the engine
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 ig-
nition to the engine. This will prevent the boat
from running away under 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 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.
NOTE:
The engine cannot be started with the lock
plate removed.
EMU26090Main 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) position,
the electrical circuits are on, and the key can-
not be removed.

“” (start)
ZMU04646
1. Lanyard
2. Lock plate
1. Lanyard
2. Lock plate
ON
STARTOFFON
STARTOFF
1
ZMU04564
2
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							Basic components
16
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.
EMU26141Power trim and tilt switch on remote 
control or tiller handle
The power trim and tilt system adjusts the out-
board motor angle in relation to the transom.
Pressing the switch “” (up) trims the out-
board 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 cur-
rent position.
NOTE:
For instructions on using the power trim and
tilt switch, see pages 34 and 36.
EMU26151Power trim and tilt switch on bottom 
engine cowling
The power trim and tilt switch is located on the
side of the bottom engine cowling. Pressing
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 released,
the outboard motor will stop in its current po-
sition.
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 dis-
tract the operator, increasing the risk of
collision with another boat or an obstacle.
ON
OFFSTARTON
OFFSTART
ZMU04566
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							Basic components
17
NOTE:
For instructions on using the power trim and
tilt switch, see page 36.
EMU26161Power trim and tilt switches (twin 
binnacle type)
The power trim and tilt system adjusts the out-
board motor angle in relation to the transom.
Pushing the switch “” (up) trims the out-
board 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 cur-
rent position.
NOTE:

On the dual engine control, the switch on
the remote control grip controls both out-
board motors at the same time.

For instructions on using the power trim and
tilt switches, see pages 34 and 36.
EMU26241Trim 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 af-
ter 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.
1. Power trim and tilt switch
1. Power trim and tilt switch
ZMU04601
DN
UP1
1. Trim tab
2. Bolt
3. Cap
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							Basic components
18
EMU26340Tilt support lever for power trim and 
tilt or hydro tilt model
To keep the outboard motor in the tilted up po-
sition, lock the tilt support lever to the clamp
bracket.
EMU26382Top cowling lock lever (pull up type)
To remove the engine top cowling, pull up 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 by moving the lever(s) downward.
EMU26460Flushing device
This device is used to clean the cooling water
passages of the motor using a garden hose
and tap water.
NOTE:
For details on usage, see page 45.
EMU26491Digital 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. Tilt support lever
1. Top cowling lock lever(s)
1. Flushing device
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							Basic components
19
NOTE:
The water separator and engine trouble warn-
ing indicators only operate when the engine is
equipped with the appropriate functions.
EMU26521Low oil pressure warning indicator
If oil pressure drops too low, the warning indi-
cator will start to blink. For further information,
see page 26.
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. Serious
engine damage will occur.

The low oil pressure warning indicator
does not indicate the engine oil level.
Use the oil dipstick to check the remain-
ing oil quantity. For further information,
see page 29.
EMU26581Overheat warning indicator (digital 
type)
If the engine temperature rises too high, the
warning indicator will start to blink. 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.
EMU26600Speedometer (digital type)
This gauge shows the boat speed.
1. Tachometer
2. Trim meter
3. Hour meter
4. Low oil pressure warning indicator
5. Overheat warning indicator
6. Set button
7. Mode button
ZMU01840
1
52
4
3
67
1. Low oil pressure warning indicator
1. Overheat warning indicator
ZMU017361
ZMU01737
1
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							Basic components
20
NOTE:
After the main switch is first turned on, all seg-
ments of the display come on as a test. After
a few seconds, the gauge will change to nor-
mal operation. Watch the gauge when turning
on the main switch to make sure all segments
come on.
NOTE:
The speedometer displays km/h, mph, or
knots, according to operator preference. Se-
lect the desired unit of measurement by set-
ting the selector switch on the back of the
gauge. See the illustration for settings.
EMU26620Trim 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 pow-
er 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.
EMU26650Hour meter (digital type)
This meter shows the number of hours the en-
gine 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. Speedometer
2. Fuel gauge
3. Trip meter/clock/voltmeter
4. Warning indicator(s)
1. Cap
2. Selector switch (for speed unit)
3. Selector switch (for fuel sensor)
ZMU01740
ZMU01741
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							Basic components
21

Changing the display format
Pressing the “” (mode) button chang-
es the display format in the following pat-
tern:
Total hours→Trip hours→Display off

Resetting the trip hours
Simultaneously pressing the “” (set) and
“” (mode) buttons for more than 1 sec-
ond while the trip hours are displayed re-
sets the trip counter to 0 (zero).
NOTE:
The total number of hours the engine has
been run cannot be reset.
EMU26690Trip meter
This gauge displays the distance the boat has
traveled since the gauge was last reset.
Press the “” (mode) button repeatedly
until the indicator on the face of the gauge
points to “” (trip). To reset the trip meter to
zero, press the “” (set) and “” (mode)
buttons at the same time.
NOTE:

The trip distance is shown in kilometers or
miles depending upon the unit of measure-
ment selected for the speedometer.

The trip distance is kept in memory by bat-
tery power. The stored data will be lost if the
battery is disconnected.
EMU26700Clock
Press the “” (mode) button repeatedly
until the indicator on the face of the gauge
points to “” (time). To set the clock, be
sure the gauge is in the “” (time) mode.
Press the “” (set) button; the hour display
will begin blinking. Press the “” (mode)
button until the desired hour is displayed.
Press the “” (set) button again, the minute
display will begin blinking. Press the “”
(mode) button until the desired minute is dis-
played. Press the “” (set) button again to
start the clock.
NOTE:
The clock operates on battery power. Discon-
necting the battery will stop the clock. Reset
the clock after connecting the battery.
EMU26710Fuel gauge
The fuel level is indicated by eight segments.
When all segments are showing, the fuel tank
is full.
CAUTION:
ECM00860
The Yamaha fuel tank sensor differs from
conventional sensors. Incorrectly setting
the selector switch on the gauge will give
false readings. Consult your Yamaha deal-
er on how to correctly set the selector
switch.
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							Basic components
22
NOTE:
The fuel level reading can be affected by the
position of the sensor in the fuel tank and the
attitude of the boat in the water. Operation
with bow-up trim or continuous turning can
give false readings.
EMU26720Fuel warning indicator
If the fuel level decreases to one segment, the
fuel level warning segment will begin to blink.
CAUTION:
ECM00880
Do not continue to operate the engine with
full throttle if a warning device has activat-
ed. Get back to the port within trolling en-
gine speed.
EMU26730Low battery voltage warning indicator
If battery voltage drops, the display will auto-
matically turn on and begin to blink.
CAUTION:
ECM00870
Get back to the port soon if a warning de-
vice has activated. For charging the bat-
tery, consult your Yamaha dealer.
EMU26740Fuel management meter
The fuel management meter shows the state
of the fuel consumption while the engine is
running.
NOTE:
After the main switch is first turned on, all seg-
ments of the display come on as a test. After
a few seconds, the gauge will change to nor-1. Fuel level warning segment
ZMU017451. Low battery indicator
1. Fuel flow meter
2. Fuel consumption meter / Fuel economy 
meter / Twin engine speed synchronizer
3. Water separator warning indicator (operates 
only if the sensor has been installed)
ZMU01748
1
2
3
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							Basic components
23
mal operation. Watch the gauge when turning
on the main switch to make sure all segments
come on.
EMU26750Fuel flow meter
The fuel flow meter displays the amount of
fuel flow over a one hour period, at the current
rate of engine operation.
If twin engines are installed on your boat, the
fuel flow meter displays the total fuel flow of
both the port and starboard engines. It also
displays “” (for port and starboard).
Use the “” (set) button to rotate the fuel flow
display in the following order:

Press the “” (set) button once to display
the fuel flow of the starboard engine. An “”
(for starboard) will also be displayed.

Press the “” (set) button a second time to
display the fuel flow of the port engine. A “”
(for port) will also be displayed.

Press the “” (set) button a third time to
return the display to the total fuel flow of
both engines. “” (for port and starboard)
will also be displayed to indicate both the
port and starboard engines.
NOTE:

The fuel flow meter displays gallons/hour or
liters/hour according to operator prefer-
ence. Select the desired unit of measure-
ment by setting the selector switch on the
back of the gauge during installation.

The fuel consumption meter and fuel econ-
omy meter will indicate the same unit of
measurement.
EMU26760Fuel consumption meter
This gauge displays the total amount of fuel
consumed since the gauge was last reset.
Press the “” (mode) button repeatedly
until the indicator on the face of the gauge
points to total “” (total). To reset the total
fuel consumption to zero, press the “” (set)
and “” (mode) buttons at the same time.
EMU26770Fuel economy
This gauge displays the distance per liter or
gallon when cruising, and is only for reference
use by the operator.
Press the “” (mode) button repeatedly
until the indicator on the face of the gauge
points to “” (economy).
ZMU01749
1. Selector switch
ZMU01751
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