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...

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...

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...

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...

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...

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...

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...

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...

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 /...

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