Yamaha F50A Manuel D'utilisation page 124

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Do not use the tilt support lever/knob
when trailering the boat. The outboard
motor could shake loose from the tilt
support and fall. If the motor can not be
trailered in the down position, use an
additional support device to secure it in
the up position.
EMK17211
STORING OUTBOARD MOTOR
When storing your outboard motor for
prolonged periods of time ( 2 months or
longer ), several important procedures
must be performed to prevent expensive
damage.
It is advisable to have your outboard ser-
viced by an authorized Yamaha dealer
prior to storage. However, the following
procedures can be performed by the
owner with a minimum of tools.
1) Using fresh water, flush the cooling-
water passages (Refer to "Flushing
cooling system") and wash the motor
body. (Refer to "MOTOR EXTERIOR").
2) Remove the fuel-line connections
from the motor.
3) Run the engine at idling speed until
the carburetor is empty.
4) Completely drain the water out of the
outboard
clean the body.
5) Remove the spark-plug, pour a tea-
spoonful of clean engine-oil into the
cylinder, and replace the spark-plug.
4-6
motor, and thoroughly
GB