MerCruiser 3.0 TKS, User Manual

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Section 5 - Maintenance
90-8M0053372
eng
NOVEMBER 2010 Page 71
Flushing the Power Package
Your boat could come equipped with a combination of any of three different types of water pickups: through the hull, through
the transom, and through the sterndrive. The flushing procedures for these systems are separated into two categories:
sterndrive water pickups and alternative water pickups. Consult your authorized Mercury MerCruiser dealer for further
explanation.
IMPORTANT: Bravo models equipped with closed cooling require dual water pickups and must be equipped with a through the
hull or through the transom pickup in addition to the sterndrive water inlets.
IMPORTANT: Alpha engines with the sterndrive water inlet blocked off at the gimbal housing, and using a through the hull
water inlet, need a supply of cooling water available to both the sterndrive unit and to the engine during operation
Flushing Attachments
Flushing Device 91‑44357Q 2
9192
Attaches to the water intakes; provides a fresh water connection when flushing
the cooling system or operating the engine.
Dual Water Pick‑up Flush Gearcase Seal
Kit
91‑881150K 1
9194
Blocks off the front water inlet holes on the dual water inlet gearcases.
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).
5752
5773
Dual Water Pickup 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.