MerCruiser 350 Magnum MPI, Operation & Maintenance Manual

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Maintenance Schedules
! WARNING
Always disconnect battery cables from battery BEFORE working around electrical system components
to prevent injury to yourself or damage to electrical system should a wire be accidentally shorted.
Only perform maintenance which applies to your particular power package.
SCHEDULED MAINTENANCE TO BE PERFORMED BY OWNER/OPERATOR
Weekly
TASK
Transmission Fluid - Check level.
INTERVAL
Closed Cooling System Coolant - Check level
Fuel Pump Sight Tube - Check for no fuel present
Engine Crankcase Oil - Check level
Seawater Strainer - Check and clean
Water Pickups - Check for marine growth or debris.
Cooling System - flush seawater section.
Drive Belts - inspect condition and check tensions.
Power Package Exterior Surfaces - clean and paint.
Battery - Check level and inspect for damage
Power Package Exterior Surfaces - spray with
Quicksilver Corrosion Guard.
Before Use and Whenever Insufficient Seawater
Flow is Suspected (If Operating Temperature
Exceeds Normal Range)
Saltwater Use: After Each Use
Every 100 Hours of Use or 120 Days
Whichever Occurs First. Once a Year.
Once a Year
Saltwater use: Every 50 hours of operation or
60 days, Whichever Occurs First
Freshwater use: Every 100 hours of operation
or 120 days, Whichever Occurs First