Mercury D4.2L Manual page 67

Maintenance Schedules (Continued)
Scheduled Maintenance (Continued)
Inspect condition and ten-
sion of belts.
Check cooling system and
exhaust system hose
clamps for tightness In-
spect both systems for
damage or leaks.
Disassemble and inspect
seawater pump and re-
place worn components.
Clean seawater section of
closed cooling system.
Clean, inspect and test
pressure cap. Check
anodes.
Replace coolant.
Replace air filter.
Clean aftercooler core.
Clean fuel tank.
z Whichever Occurs First
After After
First First Annu-
20 100
ally
hours hours
Every Every
Every
200 300
100
hours hours
hours or
or 3 or 3
Annually
years years
z
z z
D
D
D
D
D
Every Every
500
Every Every
hours hours
2 5
or 5
years years
years years
z
D
D
1000
or 5
z
D
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