SEAWATER COOLED MODELS
SERVICE MANUAL NUMBER 26
Cooling System Flow Diagram
MerCruiser engines with standard cooling systems use seawater (water in which the boat
is being operated), to remove the heat given off by the engine. The seawater is pumped to
the cooling system by means of an impeller type pickup pump (located in the vertical drive)
which picks up seawater, and delivers it to the centrifugal pump (located over an opening
on the front of the cylinder block). On some models seawater may be pumped through an
oil cooler before going to the circulating pump. The centrifugal pump then circulates the sea-
water through the block, head and manifolds, removing heat given off by these parts as it
passes through. After passing through the engine, the seawater is pumped into the exhaust
elbow where it mixes with exhaust gases and then is expelled overboard. A thermostatic
heat control, which controls circulation of seawater, also is incorporated into the system. It
provides fast engine warm-up and controlled operating temperature.
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Index
Page 6A-16
90-861329--1 MARCH 1999
| 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)
Marine readers have rated Mercury MerCruiser GM 4 Cylinder 181 cid 3.0L Marine Engines Service Manual Number 26 5.0 out of 5.0 based on 6 product reviews. Thanks for sharing this material. Helps a lot after suffering with bad mechanics. spend too much money and nothing very good
great manual, makes impossible jobs possible. without a manual you can not do the job, a must have.
Great resource. Excellent information provided.
Need help to install automate choke
Need help to instal automate choke