Mercury Racing HP525 EFI Bravo Sterndrive Series, Operation, Maintenance & Warranty Manual

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MAINTENANCE
100
eng
3.
!
WARNING
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.
If flushing the cooling system with the boat out of the water:
a. Lower sterndrive unit to full down/in position.
b. Remove propeller.
c. Install the appropriate flushing attachment over the water
inlet holes in the gear housing.
4. Connect a hose between the flushing attachment and the
water source.
5. With the sterndrive unit in normal operating position, partially
open the water source (about 1/2 maximum).
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. Operate the engine at idle speed, in neutral, for about 10
minutes or until the discharge is clear.
8. Observe the water temperature gauge to ensure that the
engine is operating in the normal range.
9. Stop the engine.
10.Shut off the water and remove the flushing attachment.
Seawater Pump Impeller Inspection
Service should be performed by an authorized Mercury
MerCruiser dealer.