Maintenance
62
EMU34151
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 en-
gine 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
engine components.
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