Yamaha F50 Manual

							 
Operation 
45 
3. Tighten the air vent screw on the fuel
tank cap (if equipped).
4. Remove the key if the boat will be left
unattended.
NOTE:
 
The engine can also be stopped by pulling
the lanyard and removing the lock plate 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
angle depends upon the combination of
boat, engine, and propeller. Correct trim is
also affected by variables such as the load inthe 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
steering the boat more difficult. This in-
creases 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. 
EMU27882 
Adjusting trim angle 
Power trim and tilt models
WARNING
 
EWM00751  
 
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
ZMU03632
ZMU02301
 
1. Trim operating angle
1
ZMU03633 
						

							 
Operation 
46 
clamp bracket. 
 
Use caution when trying a trim position
for the first time. Increase speed gradu-
ally and watch for any signs of instabil-
ity or control problems. Improper trim
angle can cause loss of control. 
 
If equipped with a power trim and tilt
switch located on the bottom cowling,
use the switch only when the boat is at
a complete stop with the engine off. Do
not adjust the trim angle with this 
switch while the boat is moving. 
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
angles to find the position that works best for
your boat and operating conditions. 
EMU27911 
Adjusting 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. 
1. Power trim and tilt switch
1. Power trim and tilt switch
UP
DN
ZMU03634
1
 
1. Power trim and tilt switch 
						

							 
Operation 
47 
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 per-
formance further, and the boat may “por-
poise” (hop in the water), which could throw
the operator 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. Oper-
ating 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 out-
board motor should be tilted up to protect the
propeller and casing from damage by colli-
sion with obstructions, and also to reduce
salt corrosion.
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.
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 
						

							 
Operation 
48 
on page 44. 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. 
EMU28007 
Procedure for tilting up (power trim 
and tilt models / power tilt models) 
1. Place the remote control lever / 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 /
power tilt switch “” (up) until the out-
board motor has tilted up completely.
N
ZMU03196
ZMU03638
UP
ZMU03639 
						

							 
Operation 
49 
4. Push the tilt support knob into the clamp
bracket or pull the tilt support lever to-
ward 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
motor could fall back down suddenly if oil
in the power trim and tilt unit loses pres- 
sure. 
5. Models equipped with trim rods: Once
the outboard motor is supported with the
tilt support lever, press the power trim
and tilt switch / power tilt switch “”
(down) to retract the trim rods.
CAUTION:
 
ECM00250  
Be sure to retract the trim rods complete-
ly during mooring. This protects the rodsfrom marine growth and corrosion which
could damage the power trim and tilt 
mechanism. 
EMU28055 
Procedure 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.
ZMU03640
ZMU03644
DN
ZMU01936
UPDN 
						

							 
Operation 
50 
EMU28060 
Cruising in shallow water 
The outboard motor can be tilted up partially
to allow operation in shallow water. 
EMU28090 
Power 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
setting 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. 
EMU28185 
Procedure 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.
DN
ZMU03645
UP
ZMU01935
UPDN 
						

							 
Operation 
51 
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 de-
posits.
NOTE:
 
For cooling system flushing instructions, see 
page 53. 
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
conditions.
UP
ZMU03650 
						

							 
52 
Maintenance 
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: 
706 mm (27.8 in)
Overall width: 
384 mm (15.1 in)
Overall height L: 
F50TR 1415 mm (55.7 in)
F60TR 1415 mm (55.7 in)
T50TR 1455 mm (57.3 in)
T60TR 1455 mm (57.3 in)
Transom height L: 
F50TR 527 mm (20.7 in)
F60TR 527 mm (20.7 in)
T50TR 530 mm (20.9 in)
T60TR 530 mm (20.9 in)
Weight (without propeller) L: 
F50TR 108.0 kg (238 lb)
F60TR 108.0 kg (238 lb)
T50TR 113.0 kg (249 lb)
T60TR 113.0 kg (249 lb) 
Performance: 
Full throttle operating range: 
5000–6000 r/min
Maximum output: 
F50TR 36.8 kW@5500 r/min 
(50 HP@5500 r/min)
F60TR 44.1 kW@5500 r/min 
(60 HP@5500 r/min)
T50TR 36.8 kW@5500 r/min 
(50 HP@5500 r/min)T60TR 44.1 kW@5500 r/min 
(60 HP@5500 r/min)
Idling speed (in neutral): 
750  
± 
50 r/min 
Engine: 
Type: 
4-stroke L
Displacement: 
996.0 cm 
3
 
 (60.78 cu.in)
Bore  
× 
 stroke: 
65.0  
× 
 75.0 mm (2.56  
×  
 2.95 in)
Ignition system: 
TCI
Spark plug with resistor (NGK): 
DPR6EB-9
Spark plug gap: 
0.8–0.9 mm (0.031–0.035 in)
Control system: 
Remote control
Starting system: 
Electric
Starting carburetion system: 
Electronic fuel injection
Valve clearance (cold engine) IN: 
0.15–0.25 mm (0.0059–0.0098 in)
Valve clearance (cold engine) EX: 
0.25–0.35 mm (0.0098–0.0138 in)
Min. cold cranking amps (CCA/SAE): 
380.0 A
Min. marine cranking amps (MCA/ABYC): 
502.0 A
Min. reserve capacity (RC/SAE): 
124 minutes
Alternator output for battery DC: 
17.0 A 
Drive unit: 
Gear positions: 
Forward-neutral-reverse
Gear ratio: 
F50TR 1.85 (24/13)
F60TR 1.85 (24/13) 
						

							 
Maintenance 
53 
T50TR 2.33 (28/12)
T60TR 2.33 (28/12)
Trim and tilt system: 
Power trim and tilt
Propeller mark: 
F50TR G
F60TR G
T50TR K
T60TR K 
Fuel and oil: 
Recommended fuel: 
Regular unleaded gasoline
Min. pump octane: 
86
Fuel tank capacity: 
24 L (6.34 US gal) (5.28 Imp.gal)
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): 
2.5 L (2.64 US qt) (2.20 Imp.qt)
Recommended gear oil: 
Hypoid gear oil SAE#90
Gear oil quantity: 
F50TR 430.0 cm 
3
 
 (14.54 US oz) 
(15.17 Imp.oz)
F60TR 430.0 cm 
3
 
 (14.54 US oz) 
(15.17 Imp.oz)
T50TR 670.0 cm 
3
 
 (22.65 US oz) 
(23.63 Imp.oz)
T60TR 670.0 cm 
3
 
 (22.65 US oz) 
(23.63 Imp.oz) 
Tightening torque for engine: 
Spark plug: 
18.0 Nm (13.3 ft-lb) (1.84 kgf-m)
Propeller nut: 35.0 Nm (25.8 ft-lb) (3.57 kgf-m)
Engine oil drain bolt: 
18.0 Nm (13.3 ft-lb) (1.84 kgf-m)
Engine oil filter: 
18.0 Nm (13.3 ft-lb) (1.84 kgf-m) 
EMU28222 
Transporting and storing 
outboard motor
WARNING
 
EWM00690  
 
Leaking fuel is a fire hazard. When
transporting 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 consid-
erably 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
motor could shake loose from the tilt sup-
port and fall. If the motor cannot be trail-
ered in the normal running position, use
an additional 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, 
						

							 
Maintenance 
54 
then trailer the outboard motor in the tilt po-
sition using a motor support device such as
a transom saver bar. Consult your Yamaha
dealer for further details. 
EMU28280 
Storing 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
serviced by an authorized Yamaha dealer
prior to storage. However, you, the owner,
with a minimum of tools, can perform the fol-
lowing procedures.
CAUTION:
 
ECM01080  
 
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. If storing or transporting
the outboard motor on its side (not up-
right), put it on a cushion after draining
the engine oil. 
 
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 trou-ble. 
 
Store the outboard motor in a dry, well- 
ventilated place, not in direct sunlight. 
EMU28302 
Procedure 
EMU30001 
Flushing with the flushing attachment 
1. Wash the outboard motor body using
fresh water. For further information, see
page 57.
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 en-
gine will be damaged from overheating.
Before starting the engine, be sure to
supply water to the cooling water passag- 
es.
CAUTION:
 
ECM00310  
Avoid running the outboard motor at high
speed while on the flushing attachment, 
otherwise overheating could occur.
ZMU03659