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Sterndrive Water Pickups
There are two types of water pickups available on Mercury MerCruiser sterndrives: dual water, and side pickups. Dual water
pickups require the flushing attachment (44357Q 2) and the flush seal kit (881150K 1), and side pickups require the flushing
attachment (44357Q 2).
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NOTE: Flushing is needed only for salty, brackish, mineral laden or polluted water applications. Flushing is recommended after
each outing for best results.
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 4. or Step 5.
2.
On Alpha closed cooled models with the sterndrive seawater inlet blocked: Flushing water will need to be supplied to
the sterndrive and to the engine. See Alternative Water Pickups.
3.
On Bravo closed cooled models using the sterndrive seawater inlet and a through-hull or through-transom alternative
water pickup: Flushing water will need to be supplied to only the sterndrive by taking the following steps to block, or disconnect
and block, the hose from the alternative seawater pickup pump inlet Y‑fitting.
a.
If equipped with a seacock, close the seacock in the hose from the alternative water pickup.
b.
If not equipped with a seacock, disconnect the hose from the alternative water pickup and plug both ends.
c.
If there is not a hose running to the transom, refer to Alternative Water Pickups.
4.
If flushing the cooling system with the boat in the water:
a.
Raise 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.
5.
If flushing the cooling system with the boat out of the water:
a.
Lower sterndrive to full down (in) position.
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.
6.
Connect hose between flushing attachment and water source.
7.
With sterndrive in normal operating position, open the water source fully.
8.
Place the remote control in the neutral idle speed position and start engine.
90-8M0053269
NOVEMBER 2010
Dual Water Pickup
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NOTICE
WARNING
!
Section 5 - Maintenance
Side Pickup
Page 87
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