Yamaha F250 Owners Manual

							Operation
45
EMU28055Procedure for tilting down (power trim 
and tilt models / power tilt models)
1. Push the power trim and tilt switch / pow-
er tilt switch “” (up) until the outboard
motor is supported by the tilt rod and the
tilt support lever / tilt support knob be-
comes free.
2. Release the tilt support lever or pull out
the tilt support knob.
3. Push the power trim and tilt switch / pow-
er tilt switch “” (down) to lower the out-
board motor to the desired position.
EMU28060
Cruising in shallow water
The outboard motor can be tilted up partially
to allow operation in shallow water.
EMU30710Power trim and tilt models / power tilt 
models
The outboard motor can be tilted up partially
to allow operation in shallow water.
ZMU01884
ZMU01885
DN
ZMU04196
ZMU04603
DN
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							Operation
46
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:
ECM01490

If the engine speed is suddenly in-
creased when the outboard motor is par-
tially tilted up, the power trim and tilt unit
could be damaged.

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
setting up for and cruising in shallow
water. Otherwise severe damage from
overheating can result.
EMU28185Procedure for power trim and tilt / power
tilt models
1. Place the remote control lever / gear shift
lever in neutral.
2. Slightly tilt the outboard motor up to the
desired position using the power trim and
tilt switch / power tilt switch.3. To return the outboard motor to the nor-
mal running position, press the power
trim and tilt switch / power tilt switch and
slowly tilt the outboard motor down.
EMU28192
Cruising in other conditions
Cruising in salt water
After operating in salt water, flush the cooling
water passages with fresh water to prevent
them from becoming clogged with salt depos-
its.
NOTE:
For cooling system flushing instructions, see
page 48.
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 or muddy water con-
ditions.N
ZMU04588
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							Maintenance
47
EMU31480
Specifications
NOTE:
“(AL)” stated in the specification data below
represents the numerical value for the alumi-
num propeller installed.
Likewise, “(SUS)” represents the value for
stainless steel propeller installed and “(PL)”
for plastic propeller installed.
EMU28218
Dimension:
Overall length:
892 mm (35.1 in)
Overall width:
634 mm (25.0 in)
Overall height X:
1829 mm (72.0 in)
Overall height U:
1956 mm (77.0 in)
Transom height X:
643 mm (25.3 in)
Transom height U:
770 mm (30.3 in)
Weight (without propeller) X:
274.0 kg (604 lb)
Weight (without propeller) U:
280.0 kg (617 lb)
Performance:
Full throttle operating range:
5000–6000 r/min
Maximum output:
183.9 kW@5500 r/min (250 HP@5500 r/min)
Idling speed (in neutral):
650 ±50 r/min
Engine:
Type:
4-stroke V
Displacement:
3352.0 cm³ (204.54 cu.in)
Bore × stroke:
94.0 × 80.5 mm (3.70 × 3.17 in)
Ignition system:
TCI
Spark plug (NGK):
LFR6A-11Spark 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:
46.0 A
Drive unit:
Gear positions:
Forward-neutral-reverse
Gear ratio:
2.00 (30/15)
Trim and tilt system:
Power trim and tilt
Propeller mark:
F250TR T / M
LF250TR TL / ML
Fuel and oil:
Recommended fuel:
Premium unleaded gasoline
Min. pump octane:
89
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):
5.6 L (5.92 US qt) (4.93 Imp.qt)
Recommended gear oil:
Hypoid gear oil SAE#90
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							Maintenance
48
Gear oil quantity:
F250TR 918.0 cm³ (31.04 US oz) (32.38 
Imp.oz)
LF250TR 803.0 cm³ (27.15 US oz) (28.32 
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)
EMU31840
Transporting and storing out-
board motor
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.
EMU30720Storing 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.
NOTE:
The last time you use your Yamaha outboard
motor before storing it for a prolonged period,
add one ounce of Yamaha Fuel Conditioner
and Stabilizer to each gallon of fuel in the fuel
tank.
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							Maintenance
49
EMU28303ProcedureEMU31920Conditioning and stabilizing fuel
Fill the fuel tank with fresh fuel and add one
ounce of “Yamaha Fuel Conditioner and Sta-
bilizer” (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.
EMU31900Engine anti-rust measure
CAUTION:
ECM01530
Do not perform this procedure while the
engine is running. The water pump may be
damaged and severe damage from over-
heating can result.
NOTE:
This procedure is performed while the top
cowling is removed.
1. Remove the spark plug(s).
2. Pour a teaspoonful of clean engine oil
into each cylinder.
3. Crank the engine several times manually.
4. Reinstall the spark plug(s).
EMU31390Washing the outboard motor
NOTE:
This procedure is performed while the top
cowling is installed.
1. Wash the outboard motor body using
fresh water.
2. Drain the cooling water completely out of
the motor. Clean the body thoroughly.
EMU28401Lubrication
1. Grease the spark plug threads and install
the spark plug(s) and torque to proper
specification. For information on spark
plug installation, see page 54.
2. Change the gear oil. For instructions, see
page 63. Inspect the oil for the presence
of water that indicates a leaky seal. Seal
replacement should be performed by an
authorized Yamaha dealer prior to use.
3. Grease all grease fittings. For further de-
tails, see page 54.
EMU28421Cleaning and anticorrosion measures
1. Wash down the exterior of the outboard
motor with fresh water and dry off com-
pletely.
2. Spray the outboard motor exterior with
“Yamaha Silicone Protectant” (Part No.
LUB-SILCNE-13-00).
3. Wax the cowling with a non-abrasive wax
such as “Yamaha Silicone Wax” (Part No.
ACC-11000-15-02).
EMU28430Battery care
WARNING
EWM00330
Battery electrolytic fluid is dangerous; it
contains sulfuric acid and therefore is poi-
sonous and highly caustic.
Always follow these preventive measures:
ZMU04261
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							Maintenance
50

Avoid bodily contact with electrolytic
fluid as it can cause severe burns or per-
manent eye injury.

Wear protective eye gear when handling
or working near batteries.
Antidote (EXTERNAL):

SKIN - Flush with water.

EYES - Flush with water for 15 minutes
and get immediate medical attention.
Antidote (INTERNAL):

Drink large quantities of water or milk
followed by milk of magnesia, beaten
egg, or vegetable oil. Get immediate
medical attention.
Batteries also generate explosive hydro-
gen gas; therefore, you should always fol-
low these preventive measures:

Charge batteries in a well-ventilated ar-
ea.

Keep batteries away from fire, sparks, or
open flames (for example: welding
equipment, lighted cigarettes, and so
on.)

DO NOT SMOKE when charging or han-
dling batteries.
KEEP BATTERIES AND ELECTROLYTIC
FLUID OUT OF REACH OF CHILDREN.
Batteries vary among manufacturers. There-
fore the following procedures may not always
apply. Consult your battery manufacturer’s in-
structions.
Procedure
1. Disconnect and remove the battery from
the boat. Always disconnect the black
negative cable first to prevent the risk of
shorting.
2. Clean the battery casing and terminals.
Fill each cell to the upper level with dis-
tilled water.3. Store the battery on a level surface in a
cool, dry, well-ventilated place out of di-
rect sunlight.
4. Once a month, check the specific gravity
of the electrolyte and recharge as re-
quired to prolong battery life.
EMU28442Flushing power unit
Perform this procedure right after operation
for the most thorough flushing.
CAUTION:
ECM01530
Do not perform this procedure while the
engine is running. The water pump may be
damaged and severe damage from over-
heating can result.
1. After shutting off the engine, unscrew the
garden hose connector from the fitting on
the bottom cowling.
1. Fitting
2. Garden hose connector
3. Garden hose adapter
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							Maintenance
51
2. Screw the garden hose adapter onto a
garden hose, which is connected to a
fresh water supply, and then connect it to
the garden hose connector.
3. With the engine off, turn on the water tap
and let the water flush through the cool-
ing passages for about 15 minutes. Turn
off the water and disconnect the garden
hose adapter from the garden hose con-
nector.
4. Reinstall the garden hose connector onto
the fitting on the bottom cowling. Tighten
the connector securely.
CAUTION:
ECM00540
Do not leave the garden hose connector
loose on the bottom cowling fitting or let
the hose hang free during normal opera-
tion. Water will leak out of the connector
instead of cooling the engine, which can
cause serious overheating. Be sure the
connector is tightened securely on the fit-
ting after flushing the engine.
NOTE:

When flushing the engine with the boat in
the water, tilting up the outboard motor until
it is completely out of the water will achieve
better results.

For cooling system flushing instructions,
see page 48.
EMU28450Cleaning the outboard motor
After use, wash the exterior of the outboard
motor with fresh water. Flush the cooling sys-
tem with fresh water.
NOTE:
For cooling system flushing instructions, see
page 48.
EMU28460Checking painted surface of motor
Check the motor for scratches, nicks, or flak-
ing paint. Areas with damaged paint are more
likely to corrode. If necessary, clean and paint
the areas. A touch-up paint is available from
your Yamaha dealer.
EMU28486
Periodic maintenance
WARNING
EWM01070
Be sure to turn off the engine when you
perform maintenance unless otherwise
specified. If you or the owner is not famil-
iar with machine servicing, this work
should be done by your Yamaha dealer or
other qualified mechanic.
Maintenance, replacement, or repair of the
emission control devices and systems
may be performed by any marine engine
repair establishment or individual. All war-
ranty repairs, however, including those to
the emission control system, must be per-
formed by an authorized Yamaha marine
dealership.
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							Maintenance
52
A service manual is available for purchase
through your Yamaha dealer for owners who
have the mechanical skills, tools, and other
equipment necessary to perform mainte-
nance not covered by this owner’s manual.
EMU28510Replacement parts
If replacement parts are necessary, use only
genuine Yamaha parts or parts of the same
type and of equivalent strength and materials.Any part of inferior quality may malfunction,
and the resulting loss of control could endan-
ger the operator and passengers. Yamaha
genuine parts and accessories are available
from your Yamaha dealer.
EMU30563Maintenance chart
NOTE:

Refer to the sections in this chapter for explanations of each owner-specific action.

The maintenance cycle on these charts assume usage of 200 hours per year and regular
flushing of the cooling water passages. Maintenance frequency should be adjusted when op-
erating the engine under adverse conditions such as extended trolling.

Disassembly or repairs may be necessary depending on the outcome of maintenance
checks.

Expendable or consumable parts and lubricants will lose their effectiveness over time and
through normal usage regardless of the warranty period.

When operating in salt water, turbid or muddy water, the engine should be flushed with clean
water after each use.
The “” symbol indicates the check-ups which you may carry out yourself.
The “” symbol indicates work to be carried out by your Yamaha dealer.
Item ActionsInitial Every
10 hours 
(1 month)50 hours 
(3 months)100 hours 
(6 months)200 hours 
(1 year)
Anode(s) (external)Inspection / replace-
ment
Anode(s) (cylinder 
head,  thermostat cov-
er)Inspection / replace-
ment
Battery Inspection / charging
Cooling water passag-
esCleaning
Cowling clamp Inspection
Fuel filter (can be dis-
assembled)Inspection / replace-
ment
Fuel system Inspection
Gear oil Change
Greasing points Greasing
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							Maintenance
53
EMU28874Maintenance chart (additional)
Idling speed Inspection
PCV (Pressure Con-
trol Valve)Inspection
Power trim and tilt unit Inspection
Propeller and cotter pinInspection / replace-
ment
Shift link / shift cable Inspection / adjustment
ThermostatInspection / replace-
ment
Throttle link / throttle 
cable / throttle pick-up 
timingInspection / adjustment
Water pumpInspection / replace-
ment
Engine oil Inspection / change
Oil filter (cartridge) Change
Spark plug(s)Cleaning / adjustment / 
replacement
Timing beltInspection / replace-
ment
Item ActionsEvery
500 hours (2.5 years) 1000 hours (5 years)
Timing belt Replacement
Valve clearance 
(DOHC)Inspection / adjustment
Fuel filter (low-pres-
sure fuel pump to va-
por separator tank)Replacement
OCV (oil control valve) 
filterReplacement
Anode(s) (exhaust cov-
er, cooling water pas-
sage cover, Rectifier 
Regulator cover)Replacement
Exhaust guide, exhaust 
manifoldInspection / replace-
ment Item ActionsInitial Every
10 hours 
(1 month)50 hours 
(3 months)100 hours 
(6 months)200 hours 
(1 year)
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							Maintenance
54
EMU28931Greasing
Yamaha marine grease (Water resistant grease)
EMU30771Cleaning and adjusting spark plug
WARNING
EWM00560
When removing or installing a spark plug,be careful not to damage the insulator. A
damaged insulator could allow external
sparks, which could lead to explosion or
fire.
U6P213E0.book  Page 54  Thursday, March 9, 2006  10:20 AM