SERVICE MANUAL NUMBER 26
CLOSED COOLED MODELS
Flushing Seawater Section of Closed Cooling System
If engine is operated in salty, polluted or mineral-laden waters, seawater section of closed
cooling system should be flushed periodically (preferably after each use) with fresh water
to reduce corrosion and prevent the accumulation of deposits in the system. Seawater sec-
tion also should be thoroughly flushed prior to storage.
WARNING
When flushing cooling system with boat out of the water, be certain that area in
vicinity of propeller is clear and that no person is standing nearby. As a
precautionary measure, it is recommended that propeller be removed.
CAUTION
Do not run engine above 1500 rpm when flushing. Suction created by seawater pick-
up pump may collapse flushing hose, causing engine to overheat.
CAUTION
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 disconnected and plugged to prevent
water from flowing into boat.
CAUTION
To prevent engine or sterndrive unit damage DO NOT run engine or drive unit with-
out water being supplied to water intake openings on gear housing.
CAUTION
Watch temperature gauge at dash to ensure the engine does not overheat.
1.
Connect flushing attachment as follows:
NOTE: If flushing cooling system with boat in water, raise drive unit to trailer position, install
flushing attachment and lower drive unit to full IN/DOWN position.
a. Install Quicksilver Flushing Attachment (or equivalent) over water intake openings
in gear housing.
b. Connect hose between flushing attachment and water tap.
a
b
72672
a - Quicksilver Flushing Attachment
b - Water Hose
Index
90-861329--1
MARCH 1999
Page 6B-17
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 181 CID |
| Model Year | 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(6 votes, average: 5 out of 5)
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