MAINTENANCE
94
Flushing Cooling System
!
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.
NOTICE
Operating the engine out of the water at high speeds creates
suction, which can collapse the water supply hose and overheat
the engine. Do not operate the engine above 1400 RPM out of
the water and without sufficient cooling water supply.
To prevent silt and salt build‑up in the cooling system, flush with
freshwater.
1. Install a flushing hose from a water tap to the flushing
connector/water pick‑up. Consult your boat owner's manual
for the location and procedures for water connection.
2. Completely open the water tap. Place the remote control in
neutral position and start the engine. Operate the engine at
idle speed, in neutral, for about 10 minutes or until discharge
water is clear. Stop the engine, shut off the water, and remove
the flushing hose.
Seawater Pump Impeller Inspection
Service should be performed by an authorized Mercury MerCruiser
dealer.
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