Yamaha F150 Four Stroke Manual

							Operation
34
Remote control models
Pull up the neutral interlock trigger (if
equipped) and move the remote control lever
quickly and firmly from neutral to reverse.
EMU27820
Stopping engine
Before stopping the engine, first let it cool off
for a few minutes at idle or low speed. Stop-
ping the engine immediately after operating at
high speed is not recommended.
EMU27851Procedure
1. Turn the main switch to “” (off).2. After stopping the engine, disconnect the
fuel line or close the fuel cock if there is a
fuel joint or a fuel cock on the boat.
3. Tighten the air vent screw on the fuel tank
cap (if equipped).
4. Remove the key if the boat will be left un-
attended.
NOTE:
The engine can also be stopped by pulling the
lanyard and removing the clip from the engine
stop switch, then turning the main switch to
“” (off).
EMU27861
Trimming outboard motor
The trim angle of the outboard motor helps
determine the position of the bow of the boat
in the water. Correct trim angle will help im-
prove performance and fuel economy while
reducing strain on the engine. Correct trim an-
gle depends upon the combination of boat,
N
R
ZMU04598
OFFONOFFON
ZMU04600
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							Operation
35
engine, and propeller. Correct trim is also af-
fected by variables such as the load in the
boat, sea conditions, and running speed.
WARNING
EWM00740
Excessive trim for the operating condi-
tions (either trim up or trim down) can
cause boat instability and can make steer-
ing the boat more difficult. This increases
the possibility of an accident. If the boat
begins to feel unstable or is hard to steer,
slow down and/or readjust the trim angle.
EMU27881Adjusting trim angle
Power trim and tilt models
WARNING
EWM00750

Be sure all people are clear of the out-
board motor when adjusting the tilt an-
gle, also be careful not to pinch any
body parts between the drive unit and
clamp bracket.

Use caution when trying a trim position
for the first time. Increase speed gradu-
ally and watch for any signs of instability
or control problems. Improper trim an-
gle can cause loss of control.

Use the power tilt switch located on the
bottom engine cowling (if equipped)
only when the boat is at a complete stop
with the engine off.
Adjust the outboard motor trim angle using
the power trim and tilt switch.
To raise the bow (trim-out), press the switch
“” (up).
To lower the bow (trim-in), press the switch
“” (down).
Make test runs with the trim set to different an-
gles to find the position that works best for
your boat and operating conditions.
NOTE:
To adjust the trim angle while the boat is mov-
ing, use the power trim and tilt switch located
on the remote control device or tiller handle, if
equipped.
1. Trim operating angle
1. Power trim and tilt switch
1. Power trim and tilt switch
ZMU04601
DN
UP1
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							Operation
36
EMU27911Adjusting boat trim
When the boat is on plane, a bow-up attitude
results in less drag, greater stability and effi-
ciency. This is generally when the keel line of
the boat is up about 3 to 5 degrees. With the
bow up, the boat may have a greater tenden-
cy to steer to one side or the other. Compen-
sate for this as you steer. The trim tab can
also be adjusted to help offset this effect.
When the bow of the boat is down, it is easier
to accelerate from a standing start onto plane.
Bow Up
Too much trim-out puts the bow of the boat
too high in the water. Performance and econ-
omy are decreased because the hull of the
boat is pushing the water and there is more air
drag. Excessive trim-out can also cause the
propeller to ventilate, which reduces perfor-
mance further, and the boat may “porpoise”
(hop in the water), which could throw the op-
erator and passengers overboard.Bow Down
Too much trim-in causes the boat to “plow”
through the water, decreasing fuel economy
and making it hard to increase speed. Operat-
ing with excessive trim-in at higher speeds
also makes the boat unstable. Resistance at
the bow is greatly increased, heightening the
danger of “bow steering” and making opera-
tion difficult and dangerous.
NOTE:
Depending on the type of boat, the outboard
motor trim angle may have little effect on the
trim of the boat when operating.
EMU27933
Tilting up and down
If the engine will be stopped for some time or
if the boat is moored in shallows, the outboard
motor should be tilted up to protect the propel-
ler and casing from damage by collision with
obstructions, and also to reduce salt corro-
sion.
WARNING
EWM00220
Be sure all people are clear of the out-
board motor when tilting up and down,
also be careful not to pinch any body parts
between the drive unit and engine bracket.
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							Operation
37
WARNING
EWM00250
Leaking fuel is a fire hazard. If there is a
fuel joint on the outboard motor, discon-
nect the fuel line or close the fuel cock if
the engine will be tilted for more than a few
minutes. Otherwise fuel may leak.
CAUTION:
ECM00241

Before tilting the outboard motor, stop
the engine by following the procedure
on page 34. Never tilt the outboard mo-
tor while the engine is running. Severe
damage from overheating can result.

Do not tilt up the engine by pushing the
tiller handle (if equipped) because this
could break the handle.
EMU28005Procedure for tilting up
Power trim and tilt models / power tilt models
1. Place the remote control lever / the gear
shift lever in neutral.2. Disconnect the fuel line from the out-
board motor or close the fuel cock.
3. Press the power trim and tilt switch / pow-
er tilt switch “” (up) until the outboard
motor has tilted up completely.
N
ZMU03196
N
ZMU04588
ZMU04602
UP
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							Operation
38
4. Push the tilt support knob into the clamp
bracket or pull the tilt support lever toward
you to support the engine.
WARNING
EWM00260
After tilting the outboard motor, be sure to
support it with the tilt support knob or tilt
support lever. Otherwise the outboard mo-
tor could fall back down suddenly if oil in
the power trim and tilt unit loses pressure.
5. Models equipped with trim rods: Once the
outboard motor is supported with the tilt
support lever, press the power trim and
tilt switch “” (down) to retract the trim
rods.
CAUTION:
ECM00250
Be sure to retract the trim rods completely
during mooring. This protects the rods
from marine growth and corrosion which
could damage the power trim and tilt
mechanism.
EMU28053Procedure for tilting down
Power trim and tilt models / power tilt models
1. Push the power tilt / power trim and tilt
switch “” (up) until the outboard motor
is supported by the tilt rod and the tilt sup-
port lever / tilt support knob becomes
free.
2. Release the tilt support lever or pull out
the tilt support knob.
3. Push the power tilt / power trim and tilt
switch “” (down) to lower the outboard
motor to the desired position.
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							Operation
39
EMU28060
Cruising in shallow water
The outboard motor can be tilted up partially
to allow operation in shallow water.
EMU28090Power trim and tilt models / power tilt 
models
The outboard motor can be tilted up partially
to allow operation in shallow water.
WARNING
EWM00660

Place the gear shift in neutral before set-
ting up for shallow water cruising.

Return the outboard motor to its normal
position as soon as the boat is back in
deeper water.
CAUTION:
ECM00260
Do not tilt the outboard motor up so that
the cooling water inlet on the lower unit is
above the surface of the water when set-
ting up for and cruising in shallow water.
Otherwise severe damage from overheat-
ing can result.
EMU28184Procedure for power trim and tilt / power
tilt models
1. Place the gear shift lever in neutral.
DN
ZMU01936
UPDN
ZMU04603
DN
N
ZMU04588
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							Operation
40
2. Slightly tilt the outboard motor up to the
desired position using the power trim / tilt
switch.
3. To return the outboard motor to the nor-
mal running position, press the power
trim / tilt switch and slowly tilt the out-
board motor down.
EMU28191
Cruising in other conditions
Cruising in salt water
After operating in salt water, wash out the
cooling water passages with fresh water to
prevent them from becoming clogged with salt
deposits.
NOTE:
For cooling system flushing instructions, see
page 42.
Cruising in turbid water
Yamaha strongly recommends that you use
the optional chromium-plated water pump kit
(not available for some models) if you use the
outboard motor in turbid (muddy) water condi-
tions.
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							Maintenance
41
EMU28217
Specifications
Dimension:
Overall length:
822 mm (32.4 in)
Overall width:
511 mm (20.1 in)
Overall height L:
1714 mm (67.5 in)
Overall height X:
1842 mm (72.5 in)
Transom height L:
516 mm (20.3 in)
Transom height X:
643 mm (25.3 in)
Weight (without propeller) L:
F150TR 212.0 kg (467 lb)
Weight (without propeller) X:
216.0 kg (476 lb)
Performance:
Full throttle operating range:
5000–6000 r/min
Maximum output:
110.3 kW@5500 r/min (150 HP@5500 r/min)
Idling speed (in neutral):
700 ±50 r/min
Engine:
Type:
4-stroke L
Displacement:
2670.0 cm³ (162.92 cu.in)
Bore × stroke:
94.0 × 96.2 mm (3.70 × 3.79 in)
Ignition system:
TCI
Spark plug (NGK):
LFR5A-11
Spark plug gap:
1.0–1.1 mm (0.039–0.043 in)
Control system:
Remote control
Starting system:
Electric
Starting carburetion system:
Electronic fuel injection
Valve clearance (cold engine) IN:
0.17–0.23 mm (0.0067–0.0091 in)
Valve clearance (cold engine) EX:
0.31–0.37 mm (0.0122–0.0146 in)Min. cold cranking amps (CCA/SAE):
512.0 A
Min. marine cranking amps (MCA/ABYC):
675.0 A
Min. reserve capacity (RC/SAE):
182 minutes
Alternator output for battery DC:
35.0 A
Drive unit:
Gear positions:
Forward-neutral-reverse
Gear ratio:
2.00 (28/14)
Trim and tilt system:
Power trim and tilt
Propeller mark:
F150TR M
LF150TR ML
Fuel and oil:
Recommended fuel:
Regular unleaded gasoline
Min. pump octane:
86
Recommended engine oil:
4-stroke outboard motor oil
Engine oil grade API:
API SE, SF, SG, SH, SJ, SL
Engine oil type SAE:
SAE10W30 or SAE10W40
Lubrication:
Wet sump
Engine oil quantity (excluding oil filter):
5.2 L (5.50 US qt) (4.58 Imp.qt)
Recommended gear oil:
Hypoid gear oil SAE#90
Gear oil quantity:
F150TR 980.0 cm³ (33.13 US oz) (34.56 
Imp.oz)
LF150TR 870.0 cm³ (29.41 US oz) (30.68 
Imp.oz)
Tightening torque for engine:
Spark plug:
25.0 Nm (18.4 ft-lb) (2.55 kgf-m)
Propeller nut:
55.0 Nm (40.6 ft-lb) (5.61 kgf-m)
Engine oil drain bolt:
28.0 Nm (20.7 ft-lb) (2.86 kgf-m)
Engine oil filter:
18.0 Nm (13.3 ft-lb) (1.84 kgf-m)
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							Maintenance
42
EMU28222
Transporting and storing 
outboard motor
WARNING
EWM00690

Leaking fuel is a fire hazard. When trans-
porting and storing the outboard motor,
close the air vent screw and fuel cock to
prevent fuel from leaking.

USE CARE when transporting fuel tank,
whether in a boat or car.

DO NOT fill fuel container to maximum
capacity. Gasoline will expand consider-
ably as it warms up and can build up
pressure in the fuel container. This can
cause fuel leakage and a potential fire
hazard.
WARNING
EWM00700
Never get under the lower unit while it is
tilted, even if a motor support bar is used.
Severe injury could occur if the outboard
motor accidentally falls.
CAUTION:
ECM00660
Do not use the tilt support lever or knob
when trailering the boat. The outboard mo-
tor could shake loose from the tilt support
and fall. If the motor cannot be trailered in
the normal running position, use an addi-
tional support device to secure it in the tilt
position.
The outboard motor should be trailered and
stored in the normal running position. If there
is insufficient road clearance in this position,
then trailer the outboard motor in the tilt posi-
tion using a motor support device such as a
transom saver bar. Consult your Yamaha
dealer for further details.
EMU30061Storing outboard motor
When storing your Yamaha outboard motor
for prolonged periods of time (2 months or
longer), several important procedures must
be performed to prevent excessive damage. It
is advisable to have your outboard motor ser-
viced by an authorized Yamaha dealer prior to
storage. However, you, the owner, with a min-
imum of tools, can perform the following pro-
cedures.
CAUTION:
ECM01360

To prevent problems which can be
caused by oil entering the cylinder from
the sump, keep the outboard motor in
the attitude shown when transporting
and storing it. Do not store or transport
the outboard motor on its side (not up-
right).

Do not place the outboard motor on its
side before the cooling water has
drained from it completely, otherwise
water may enter the cylinder through the
exhaust port and cause engine trouble.

Store the outboard motor in a dry, well-
ventilated place, not in direct sunlight.
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							Maintenance
43
EMU28301ProcedureEMU30740Flushing with the flushing attachment
1. Wash the outboard motor body using
fresh water. For further information, see
page 46.
2. Fill the fuel tank with fresh fuel and add
one ounce of “Yamaha Fuel Conditioner
and Stabilizer” (Part No. LUB-FUELC-12-
00) to each gallon of fuel.
NOTE:
The use of “Yamaha Fuel Conditioner and
Stabilizer” eliminates the need to drain the
fuel system. Consult your Yamaha dealer or
other qualified mechanic if the fuel system is
to be drained instead.
3. Remove the top cowling and propeller.
4. Install the flushing attachment over the
cooling water inlet.
CAUTION:
ECM00300
Do not run the engine without supplying it
with cooling water. Either the engine water
pump will be damaged or the engine will
be damaged from overheating. Before
starting the engine, be sure to supply wa-
ter to the cooling water passages.
CAUTION:
ECM00310
Avoid running the outboard motor at high
speed while on the flushing attachment,
otherwise overheating could occur.
5. Cooling system flushing is essential to
prevent the cooling system from clogging
up with salt, sand, or dirt. In addition, fog-
ging/lubricating of the engine is mandato-
ry to prevent excessive engine damage
due to rust. Perform the flushing and fog-
ging at the same time.
WARNING
EWM00090

Do not touch or remove electrical parts
when starting or during operation.

Keep hands, hair, and clothes away from
the flywheel and other rotating parts
while the engine is running.
NOTE:

When using the flushing attachment, main-
tain adequate water pressure so that there
is a steady flow of water from the cooling
water pilot hole.

If the overheat warning device is activated,
turn the engine off, and consult your
Yamaha dealer.
6. Run the engine at a fast idle for a few
minutes in neutral position while supply-
ing fresh water.
7. Just prior to turning off the engine, quickly
spray “Yamaha Stor-Rite Engine Fogging
Oil” (Part No. LUB-STRRT-12-00) alter-
nately into the intake silencer or the fog-
1. Flushing attachment
U63P14E0.book  Page 43  Monday, June 6, 2005  4:57 PM