Periodic Maintenance; Replacement Parts; Severe Operating Conditions - Yamaha F50F Owner's Manual

Maintenance
EMU2847B

Periodic maintenance

EWM01871
WARNING
These procedures require mechanical
skills, tools, and supplies. If you do not
have the proper skills, tools, or supplies
to perform a maintenance procedure,
have a Yamaha dealer or other qualified
mechanic do the work.
The procedures involve disassembling
the motor and exposing dangerous parts.
To reduce the risk of injury from moving,
hot, or electrical parts:
Turn off the engine and keep the key(s)
●
and engine shut-off cord (lanyard) with
you when you perform maintenance
unless otherwise specified.
The power trim and tilt switches oper-
●
ate even when the ignition key is off.
Keep people away from the switches
whenever working around the motor.
When the motor is tilted, keep away
from the area under it or between it and
the clamp bracket. Be sure no one is in
this area before operating the power
trim and tilt mechanism.
Allow the engine to cool before han-
●
dling hot parts or fluids.
Always completely reassemble the mo-
●
tor before operation.
EMU28511

Replacement parts

If replacement parts are necessary, use only
genuine Yamaha parts or parts of equivalent
design and quality. Any part of inferior quality
may malfunction, and the resulting loss of
control could endanger the operator and
passengers. Yamaha genuine parts and ac-
cessories are available from your Yamaha
dealer.
66
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Severe operating conditions

Severe operating conditions involve one or
more of the following types of operation on a
regular basis:
Operating continuously at or near maxi-
●
mum engine speed (rpm) for many hours
Operating continuously at a low engine
●
speed (rpm) for many hours
Brief periods of rapid acceleration and de-
●
celeration followed by engine shut off be-
fore the engine has reached proper
operating temperature
Frequent quick acceleration and decelera-
●
tion
Frequent shifting
●
Frequently starting and stopping the en-
●
gine(s)
Operation that fluctuates often between
●
light and heavy cargo loads
Outboard motors operating under any of
these above conditions require more fre-
quent maintenance. Yamaha recommends
that you do this service twice as often as
specified in the maintenance chart. For ex-
ample, if a particular service should be done
at 50 hours, do it instead at 25 hours. This
will help prevent more rapid deterioration of
engine components.