IMPORTANT: Refer to Maintenance Charts (on following pages) for complete
listing of all scheduled maintenance to be performed. Some listings can be
done by the owner/operator, while others should be performed by an
authorized Mercury Marine dealer. Before attempting maintenance or repair
procedures not covered in this manual, Mercury Marine recommends
purchasing a Mercury Marine service manual.
Servicing High‑Horsepower Engines
All high‑performance engines require frequent maintenance and inspection
schedules due to the extreme duty cycles and related stress these products
endure. Failure to follow the detailed maintenance and service schedule as
written and supplied by Mercury Marine could lead to catastrophic engine
failure and increased owner expense.
Engine Maintenance Charts
NOTE: Only perform maintenance which applies to your particular power
package.
Interval
Task
Check prior to every use and every 3
hours of operation.
Engine crankcase oil ‑ Check
level.
Engine ‑ Inspect.
Seawater filter ‑ Check for debris
or leakage.
Power steering fluid ‑ Check level.
After every use in salty, brackish, or
mineral‑laden water.
Flush the seawater section of the
cooling system.
Every 25 hours of operation or once
every 30 days, whichever occurs first.
Crankcase oil and filter ‑ Change.
Check the oil level in the sea
pump/fuel pump and inspect for
fuel contamination.
Battery ‑ Check water level and
inspect for damage.
Fuel pump sight tube ‑ Ensure that
no fuel is present. Vapor or
condensation is acceptable.
Check the engine coolant level.
MAINTENANCE
eng 45
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