Flushing The Cooling System (Powerhead) - Mercury 225 Manual

• Replace spark plugs at first 100 hours or first year. After
that, inspect spark plugs every 100 hours or once yearly.
Replace spark plugs as needed.
• Replace the water separating fuel filter.
• Use QuicKleen in fuel.
• Check cowl seals to make sure seals are intact and not
damaged.
• Check internal cowl sound reduction foam (if equipped) to
make sure foam is intact and not damaged.
• Check that the intake silencer (if equipped) is in place.
• Check that the idle relief muffler (if equipped) is in place.
• Check for loose hose clamps and rubber boots (if equipped)
on the air intake assembly.
EVERY 100 HOURS OF OPERATION
• Inspect carbon fiber reeds for chipping or cracks.
BEFORE PERIODS OF STORAGE
• Refer to Storage section.

Flushing the Cooling System (Powerhead)

Flush the internal water passages of the engine 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.
a
a - Plug located on fitting
b - Water hose
1. Remove the plug from fitting in the bottom cowl.
MAINTENANCE
72
b
2730
eng