Flushing Seawater Cooling
System
Belt Driven Seawater Pump
1.
Close seacock (if so equipped) or remove and
plug seawater inlet hose.
If engine is operated in salty, polluted or mineral-lad-
en waters, seawater cooling system should be
flushed periodically (preferably after each use) with
fresh water to reduce corrosion and prevent the ac-
cumulation of deposits in the system. Seawater cool-
ing system also should be thoroughly flushed prior to
storage.
2.
Loosen hose clamp and remove seawater inlet
hose at location shown. Connect tap water hose
to inlet fitting.
!
WARNING
When flushing, be certain the area around pro-
peller is clear, and no one is standing nearby. To
avoid possible injury, remove propeller.
!
CAUTION
Do not run engine above 1500 RPM when flush-
ing. Suction created by seawater pickup pump
may collapse flushing hose, causing engine to
overheat.
b
70346
a
IMPORTANT: If cooling system is to be flushed
with boat in the water, seacock (if so equipped)
must be closed, or water inlet hose must be dis-
connected and plugged to prevent water from
flowing into boat.
With Combination Seawater / Mechanical Fuel
Pump
a - Hose To Cooler
b - Seawater Inlet Hose
!
CAUTION
Watch temperature gauge at dash to ensure the
engine does not overheat.
b
a
72352
Without Mechanical Fuel Pump
a - Seawater Inlet Hose
b - Hose To Cooler
Index
6A-36 - SEAWATER COOLED SYSTEMS
90-823224--2 796
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1993, 1994, 1995, 1996, 1997 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(4 votes, average: 4.5 out of 5)
Marine readers have rated 1993 1997 Mercury-MerCruiser GM V8 454 CID 7.4L and 502 CID 8.2L Marine Engines Service Manual Number 16 4.5 out of 5.0 based on 4 product reviews. Hugely helpful service manual! Perfect. Thank you!
Manuals are all Important for Technician
This book is invaluable if you do your own repairs. Great book.
Could not find a copy until a search brought me here.
Excellent print.
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