Maintenance Schedules; Routine Maintenance - Mercury D4.2L Manual

CD637

Maintenance Schedules

Routine Maintenance

Check crankcase oil (interval can be extended based on experi-
ence).
If operating in salt, brackish or polluted waters, flush cooling system
after each use.
Drain any water from fuel filter after each use (If operating in freez-
ing temperatures).
Check drive unit oil level, trim pump oil level and power steering
pump fluid level.
Check water pickups for debris or marine growth. Check water
strainer and clean. Check coolant level.
Inspect drive unit anodes and replace if 50 percent eroded.
Check battery connections and fluid level.
Lubricate propeller shaft and the retorque nut (if operating in only
freshwater, this maintenance may be extended to every four
months).
Operating in Saltwater Only: treat engine surface with corrosion
guard.
Clean air filter every 50 hours of operation.
Each Each
Day Day Weekly
Start End
D
D
D
D
D
D
Every
Two
Months
D
D
D
D
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