Mercury D4.2L D-Tronic

67
Maintenance Schedules (Continued)
Scheduled Maintenance (Continued)
After
First
20
hours
After
First
100
hours
Annu-
ally
Every
100
hours or
Annually
z
Every
200
hours
or 3
years
z
Every
300
hours
or 3
years
z
Every
2
years
Every
5
years
Every
500
hours
or 5
years
z
Every
1000
hours
or 5
years
z
Inspect condition and ten-
sion of belts.
D
Check cooling system and
exhaust system hose
clamps for tightness In-
spect both systems for
damage or leaks.
D
Disassemble and inspect
seawater pump and re-
place worn components.
D
Clean seawater section of
closed cooling system.
Clean, inspect and test
pressure cap. Check
anodes.
D
Replace coolant. D
Replace air filter. D
Clean aftercooler core. D
Clean fuel tank. D
z Whichever Occurs First