Flushing The Power Package-Bravo; General Information; Flushing The Power Package; Flushing Attachments - Mercury 350 MAG Manual

Section 5 - Maintenance
b. Remove propeller.
c. Install the appropriate flushing attachment over the water inlet holes in the gear housing.
5. Connect hose between flushing attachment and water source.
6. With sterndrive in normal operating position, open the water source completely.
7. Place the remote control in the neutral idle speed position and start the engine.
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.
8. Depress the throttle only button and slowly advance the throttle until the engine reaches 1300 RPM (± 100 RPM).
9. Observe the water temperature gauge to ensure that the engine is operating in the normal range.
10. Operate engine with sterndrive in neutral for about 10 minutes or until discharge water is clear.
11. Slowly return throttle to idle speed position.
12. Stop engine.
13. Shut off water and remove flushing attachment.
14. This step is only required if the boat is to be stored in the water. After the flush procedure is completed, remove the seawater
inlet hose from the thermostat housing and plug the hose to prevent water from siphoning into the boat. This prevents seawater
from contaminating the engine flush.
15. Tag the ignition switch with an appropriate tag requiring the seawater inlet hose to be reconnected prior to operating engine.
Flushing the Power Package—Bravo

General Information

Your authorized Mercury MerCruiser dealer can explain how to properly flush your power package.

Flushing the Power Package

The boat can be 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.
IMPORTANT: Engines that require dual water pickups require a through‑the‑hull or through‑the‑transom pickup in addition to the
sterndrive water inlets.
IMPORTANT: Engines with the sterndrive water inlet blocked off at the gimbal housing and using a through‑the‑hull or
through‑the‑transom pickup need a supply of cooling water available to both the sterndrive and to the engine during operation.

Flushing Attachments

b
c
Flushing attachments for dual water pickup
a - Flushing device
b - Hose attachment
c - Dual water pickup flush gearcase seal kit
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NOTICE
a
21514
b
Flushing attachments for side water pickup
a
21515
90-8M0050539 MAY 2011
eng