Flushing Device 91‑44357Q 2
Attaches to the water intakes; provides a fresh water connection when flushing the cooling system or
operating the engine.
5773
Side pickup
NOTE: Flushing is required for salty, brackish, mineral‑laden, or polluted water applications. Flush the engine after each outing
for best results.
1. Remove the propeller.
2. Install the appropriate flushing attachment over the water inlet holes in the gear housing.
3. Lower the sterndrive to the full down/in position.
4. Connect the hose between the flushing attachment and the water source.
5. With the sterndrive in normal operating position, open the water source completely.
6. Place the remote control in the neutral idle speed position and start the 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.
7. Press the throttle only button and slowly advance the throttle until the engine reaches 1300 RPM (± 100 RPM).
8. Observe the water temperature gauge to ensure that the engine is operating in the normal range.
9. With the sterndrive in neutral, operate the engine for at least 10 minutes.
10. Slowly return the throttle to the idle speed position.
11. Stop the engine.
12. Shut off the water and remove the flushing attachment.
13. Raise the sterndrive to the full up/out position.
14. Install the propeller.
Alpha Models with Closed Cooling
IMPORTANT: Alpha models equipped with closed cooling have a sea pump on the engine and a through‑the‑hull or
transom‑mounted seawater pickup that supplies water to the engine. The water inlet on the gearcase housing supplies water to
the water pump in the sterndrive and is necessary for drive cooling, but does not supply water to the engine on models with
closed cooling. Models with closed cooling use a block‑off plate on the gimbal housing. Water flow from the sterndrive water
pump is discharged at the transom assembly.
Section 4 - Maintenance
Page 80 90-8M0128973 eng MAY 2017
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