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Dual Water Pick‑up Flush Gearcase Seal Kit
Sterndrive Water Pickups
There are two types of water pickups available on Mercury MerCruiser sterndrives: dual water, and side water pickups. Dual
water pickups require the flushing attachment (44357Q 2) and the flush seal kit (881150K 1), and side water pickups require
the flushing attachment (44357Q 2).
5752
Dual water pickup
NOTE: Flushing is only required after operation in salty, brackish, mineral‑laden, or polluted water. Flushing is required after
each outing for best results.
1.
On models with the sterndrive seawater inlet blocked, supply water to the sterndrive and to the engine. Refer to
Alternative Water Pickups.
2.
On models using the sterndrive seawater inlet and a through‑the‑hull or through‑the‑transom alternative water pickup,
supply water only to the sterndrive by taking the following steps to block off, or disconnect and plug the hose from the
alternative seawater pickup pump inlet Y‑fitting.
a.
If equipped with a seacock, close the seacock on 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.
3.
On models using the sterndrive water pickups for water supply: proceed to Step 4 or Step 5.
4.
If flushing the cooling system with the boat in the water:
a.
Raise the sterndrive to the trailer position.
b.
Install the appropriate flushing attachment over the water inlet holes in the gear housing.
c.
Lower the sterndrive to the full down (in) position.
5.
If flushing the cooling system with the boat out of the water:
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.
a.
Engage the E‑stop switch and remove the propeller.
b.
Lower the sterndrive to the full down (in) position.
c.
Install the appropriate flushing attachment over the water inlet holes in the gear housing.
90-8M0128976
MAY 2017
eng
Blocks off the front water inlet holes on the dual water inlet gearcases.
9194
5773
WARNING
!
Section 4 - Maintenance
91‑881150K 1
Side water pickup
Page 77
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