MAINTENANCE
eng 85
• Remove engine deposits with Mercury Precision or
Quicksilver Power Tune Engine Cleaner.
• Check tightness of bolts, nuts, and other fasteners.
• Clean fuel tank pick up filter.
EVERY 300 HOURS OF USE OR THREE YEARS
• Replace water pump impeller (more often if overheating
occurs or reduced water pressure is noted).
1.
BEFORE PERIODS OF STORAGE
• Refer to Storage procedure. See Storage section.
Flushing the Cooling System
FLUSHING
Flush the internal water passages of the outboard with fresh
water after each use in salt, polluted, or muddy water. This will
help prevent a buildup of deposits from clogging the internal
water passages.
Use a Mercury Precision or Quicksilver Accessory (or equivalent)
flushing attachment.
IMPORTANT: The engine must be run during flushing in order to
open the thermostat and circulate water through the water
passages.
!
WARNING
Rotating propellers can cause serious injury or death. Never
operate the boat out of the water with a propeller installed.
Before installing or removing a propeller, place the drive unit in
neutral and engage the lanyard stop switch to prevent the
engine from starting. Place a block of wood between the
propeller blade and the anti‑ventilation plate.
1. Remove the water plug from the motor and screw in the
associated flushing plug (hose adapter).
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