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...

 
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...

 
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...

 
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...

 
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...

 
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...

 
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...

 
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...

 
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...

 
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...