SECTION - 9 PREDELIVERY PREPARATION AND STORAGE
90-899883183 DECEMBER 2007 Page 13 / 24
STERNDRIVE WATER PICKUPS
This Mercury MerCruiser sterndrive is equipped with side water pickups. Side pickups require the
flushing attachment (44357Q 2).
5773
Side Pickup
NOTE: Flushing is needed only for salty, brackish, mineral‑laden, or polluted water applications.
Flushing is recommended after each outing for best results.
NOTICE
Flushing the engine with the boat in the water can cause seawater to flow into the engine,
resulting in engine damage. Close the seacock before flushing the engine. Keep the seacock
closed until starting the engine.
1. On seawater cooled models: Proceed to Step 5. or Step 6.
NOTE: Closed cooled models are equipped with a heat exchanger on the side of the engine.
2. If flushing the cooling system with the boat in the water:
a. Raise the sterndrive to trailer position.
b. Install the appropriate flushing attachment over the water inlet holes in the gear housing.
c. Lower sterndrive to full down/in position.
3. If flushing the cooling system with the boat out of the water:
a. Lower sterndrive to full down/in position.
!
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.
b. Remove propeller.
c. Install the appropriate flushing attachment over the water inlet holes in the gear housing.
4. Connect hose between flushing attachment and water source.
5. With sterndrive in normal operating position, open the water source completely.
6. Place the remote control in the neutral idle speed position and start engine.
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.
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