Replacement Parts; Severe Operating Conditions - Yamaha F150 Owner's Manual

 The power trim and tilt switches operate
even when the ignition key is off. Keep
people away from the switches whenev-
er 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 handling
hot parts or fluids.
 Always completely reassemble the mo-
tor before operation.
Maintenance, replacement, or repair of
the emission control devices and systems
on models affixed with an emission con-
trol label may be performed by any marine
engine repair establishment or individual.
All warranty repairs, however, including
those to the emission control system,
must be performed by an authorized
Yamaha marine dealership.
EMU28512

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 pas-
sengers. Yamaha genuine parts and acces-
sories are available from your Yamaha dealer.
EMU34152

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
 Operating without sufficient time for engine
to warm up and cool down
 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 en-
gine components.
Maintenance
73