Yamaha 50 Owner's Manual page 64

Maintenance
are different, you should consider service
more often than shown, especially how often
you change your engine and gear oil. Exam-
ples might include extended wide-open-
throttle use or long periods of trolling or
idling, carrying heavy loads, or frequent
starting and stopping or shifting. More fre-
quent maintenance will often pay off many
times over in increased engine life and great-
er owner satisfaction. Consult your Yamaha
dealer for additional maintenance recom-
mendations.
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