Maintenance; Outline; Maintenance Interval Chart - Yamaha F4B Service Manual

MNT

Outline

• To obtain long product life, Yamaha strongly recommends that the specified periodic checks and
maintenance 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 a 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 the 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 operation for extended periods of time, carrying heavy loads, and frequent starting and stop-
ping or shifting. In most cases, the frequent maintenance pays off in increased engine life and
greater owner satisfaction.
• The maintenance cycle on these charts assumes usage of 100 hours per year and regular flush-
ing of the cooling water passages. Adjust the maintenance frequency 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 the outboard motor in salt water, or in muddy, turbid (cloudy), or acidic water, flush
the engine using clean water after each use.

Maintenance interval chart

Item
Anode (external)
Anode (thermostat cover) Check/replace
Battery (electrolyte level,
terminal)
Cooling water leakage
Cowling lock lever
Engine starting condition/
noise
Engine idle speed/noise
Engine oil
Engine shut-off switch
Fuel strainer
Fuel hose
Fuel pump
Fuel/oil leakage
Gear oil
Greasing points
Impeller/
water pump housing
10-1

Maintenance

Actions
Check/replace
Check/charge/replace
Check
Check
Check
Check
Replace
Check/replace
Check/replace
Check/replace
Check/replace
Check
Replace
Lubricate
Check/replace
Initial Every
20 hours 100 hours 300 hours
(3 months) (1 year) (3 years)


 
 

 
 
 
 
 
 
 
 
 

See
500 hours
page
(5 years)
8-4
7-35
10-3
10-7
10-11
10-6
10-7
10-8
10-4
6-6
6-1

6-22
6-1
10-9
10-10
8-6
8-14