Yamaha F150B Service Manual page 424

MNT
Outline
• To ensure long product life, Yamaha strongly recommends the specified periodic check and main-
tenance to be performed according to the maintenance interval chart.
• If replacement parts are necessary, use only genuine Yamaha parts of equivalent design and qual-
ity. Any parts of inferior quality may cause malfunction, and the resulting loss of control could
endanger the operator and passengers. Yamaha genuine parts and accessories are available
from Yamaha dealers.
• The service intervals provided in the Maintenance Chart are based upon "typical" operating condi-
tions that include speed variations, sufficient time for engine warm up and cool-down, medium to
light load, and an average cruising speed in 3000 to 4000 r/min range. If your normal operating
conditions are more intensive, more frequent servicing will be required, especially the engine oil
and gear oil changes. Examples of the intensive operation will be; wide-open-throttle, trolling or
idling operations for extended period of time, carrying heavy loads, or frequent starting and stop-
ping or shifting. In most cases, the frequent maintenance pays off in increased engine life and
greater owner satisfaction. Consult Yamaha dealer for additional recommendations.
• The maintenance cycle on these charts assume usage of 100 hours per year and regular flushing
of the cooling water passages. Maintenance frequency should be adjusted when operating the
engine under adverse conditions such as extended trolling.
• Disassembly or repairs may be necessary depending on the outcome of maintenance checks.
• Expendable or consumable parts and lubricants will lose their effectiveness over time and through
normal usage regardless of the warranty period.
• When operating in salt water, muddy, turbid (cloudy), or acidic water, the engine should be flushed
with clean water after each use.
10-1
Maintenance