GASOLINE STERNDRIVE INSTALLATION MANUAL
Page 118 of 137
90-860172011
6. Disconnect the water hose adapter from the blue drain hose and the water hose.
7. Check for water draining from the blue drain hose. If water is draining, return to Step 3
of “3.0L Single Point Drain.” If water is not draining, go to “Boat Out of Water - Engine
Running.” If you cannot perform the engine running procedure, the unit will need to be
serviced by an authorized Mercury MerCruiser dealer.
Engine Running
1. Attach UNCLOGGED blue drain hose to the bracket, leaving the CLOGGED blue drain
hose disconnected.
2. Install flushing attachment over water pickup holes in gear housing as shown.
72693
a
a -
Flushing Attachment
3. Attach a hose between the flushing attachment and a water supply.
4. Partially open water supply (approximately 1/2 maximum capacity). DO NOT use full
water pressure.
CAUTION
Ensure bilge pump is operating before beginning procedures. Excess water in bilge
can damage engine or cause boat to sink.
5. Turn on the bilge pump.
CAUTION
Do not run engine above 1300 rpm. Suction created by seawater pickup pump may
collapse water supply hose, causing engine to overheat.
WARNING
Be certain the area around propeller is clear and no one is standing nearby. To avoid
possible injury, remove propeller.
CAUTION
Watch temperature gauge on dash to ensure that engine does not overheat.
6. Start engine. Allow it to run at idle until the obstruction is cleared from the hose or for
approximately 1 minute, whichever occurs first.
7. Shut off engine.
8. Shut off water supply to flushing attachment. Remove hose and flushing attachment.
9. Check for water draining from the blue drain hose. If blue drain hose is still clogged, shut
off the bilge pump and reattach the blue drain hoses following Steps 7 - 9 in “3.0L Single
Point Drain.” The unit will need to be serviced by an authorized Mercury MerCruiser
dealer. If water is draining, return to Step 3 of “3.0L Single Point Drain.”
