SEAWATER COOLED MODELS
SERVICE MANUAL NUMBER 23
CAUTION
If boat is in the water, seacock (if equipped) must be left closed until engine is to
be restarted to prevent water from flowing back into cooling system. If boat is not
fitted with a seacock, water inlet hose must be left disconnected and plugged, to
prevent water from flowing into cooling system and/or boat. As a precautionary
measure, attach a tag to the ignition switch or steering wheel with the warning that
the seacock must be opened or the water inlet hose reconnected prior to starting
the engine.
5.
Shut off tap water. Remove flushing connector from pump inlet. Refer to preceding
precautionary statement and then follow instructions “a” or “b.”
a. If equipped with seacock: Reconnect water inlet hose and tighten hose clamp
securely. Open seacock accordingly.
b. If NOT equipped with seacock: Unplug and reconnect seawater inlet hose accord-
ingly. Tighten hose clamp securely.
454
Mag MPI Horizon Models
CAUTION
Do NOT start engine at any point in this procedure. If boat is in the water, starting
engine during this procedure will pull in seawater. If boat is out of the water, starting
engine may damage the seawater pump.
1.
Remove blue cap from hose fitting.
Attach hose to the hose fitting.
2.
a
b
75637
a - Hose Fitting
b - Flush Adapter
3.
4.
5.
6.
7.
8.
9.
10.
Turn on water to highest pressure.
Attach hose fitting to engine flush fitting on exhaust elbow.
Allow engine to flush for 5 minutes.
Attach to next engine, if equipped, and repeat procedure.
Remove hose fitting from the engine flush fitting.
Turn off water.
Remove hose fitting from hose.
Replace blue cap on hose fitting.
Page 6A-22
90-861326--1 MARCH 1999
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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