Mercury MerCruiser 3.0 MPI Installation Manual page 145

SECTION - 9
4. Turn on the bilge pump and supply water to the water inlets. If the boat is out of the water,
install the flushing attachment and open the water source fully to provide maximum water flow.
Flushing Device
5. Start the engine and allow it to operate at idle until the obstruction is cleared from the hose or
for approximately 1 minute, whichever occurs first.
6. Check for water draining from the blue drain hose. If after 1 minute of idling, the blue drain
hose is still clogged, proceed to Step 7. If water is draining, shut off the engine and continue
with Step 3 of Single Point Drain System.
7. Shut off the engine. Disconnect the water source if connected to a flush device.
8. Attach the female end of the water hose adapter fitting to a water supply.
9. Attach the clogged blue drain hose to the male end of the water hose adapter fitting.
10. Fully open the water supply and allow it to run for 1 minute.
11. Turn off the water supply. Disconnect the water hose adapter from the blue drain hose and
the water hose.
12. Push down on the T‑handle to force the blue drain hoses down below their connection points
on the block.
13. Check for water draining from the blue drain hose. If the blue drain hose is still clogged, shut
off the bilge pump and reattach the blue drain hoses following the steps below. The unit will
need to be serviced by an authorized Mercury MerCruiser dealer.
a.
b.
c.
90-899883183 DECEMBER 2007
a
a - Flushing attachment
Hose Adapter Fitting (22‑863840)
Pull the T‑handle until the quick connect fittings on the blue drain hoses are within reach.
Install the quick connect fittings on the bracket. Pull on the blue drain hoses to ensure
they are firmly connected.
Push down on the T‑handle until seated.
PREDELIVERY PREPARATION AND STORAGE
7358
91‑44357Q 2
7252
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