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...

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...

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...

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...

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...

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...

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,...

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...

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....

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...