Lubrication (Oil Injection Models); Cleaning The Outboard Motor - Yamaha 50 Owner's Manual

Maintenance
fuel system. Consult your Yamaha dealer or
other qualified mechanic if the fuel system is
to be drained instead.
3. Remove the engine top cowling and si-
lencer cover.
4. Install the outboard motor on the test
tank.
1. Water surface
2. Lowest water level
5. Fill the tank with fresh water to above the
level of the
NOTICE: If the fresh water level is be-
low the level of the anti-cavitation
plate, or if the water supply is insuffi-
cient, engine seizure may occur.
[ECM00291]
6. Cooling system flushing is essential to
prevent the cooling system from clog-
ging up with salt, sand, or dirt. In addi-
tion, fogging of the engine is mandatory
to prevent excessive engine damage
due to rust. Perform the flushing and
fogging at the same time. WARNING!
Do not touch or remove electrical
parts when starting or during opera-
tion. Keep hands, hair, and clothes
away from the flywheel and other ro-
tating parts while the engine is run-
ning.
[EWM00091]
7. Run the engine at a fast idle for 10–15
56
1
2
ZMU02051
anti-cavitation plate.
minutes in neutral position.
8. Just prior to turning off the engine, quick-
ly spray "Yamaha Stor-Rite Engine
Fogging Oil" alternately into each carbu-
retor or the fogging hole of the silencer
cover, if equipped. When properly done,
the engine will smoke excessively and
almost stall.
9. Remove the outboard motor from the
test tank.
10. Drain the cooling water completely out
of the motor. Clean the body thoroughly.
11. Install the silencer cover/cap and top
cowling.
EMU28411

Lubrication (oil injection models)

1. Install the spark plug(s) and torque to
proper specification. For information on
spark plug installation, see page 62.
2. Fill the oil tanks. This prevents the for-
mation of condensation. For models with
a remote oil tank, it may be necessary to
manually override the control unit to
completely fill the engine oil tank.
3. Change the gear oil. For instructions,
see page 66. Inspect the oil for the pres-
ence of water which indicates a leaky
seal. Seal replacement should be per-
formed by an authorized Yamaha dealer
prior to use.
4. Grease all grease fittings. For further de-
tails, see page 62.
TIP:
For long-term storage, fogging the engine
with oil is recommended. Contact your
Yamaha dealer for information about fogging
oil and procedures for your engine.
EMU28451

Cleaning the outboard motor

After use, wash the exterior of the outboard
motor with fresh water. Flush the cooling