CLOSED COOLED MODELS
SERVICE MANUAL NUMBER 26
Torque Specifications
Description
lb-in.
lb-ft
Nm
Drain Plugs
Securely
Heat Exchanger End Caps
Reservoir to Thermostat Housing
Thermostat Cover
190
22
41
27
30
20
Hose Clamps
Securely
Heat Exchanger Mounting Brackets
Lubricants/Sealants/Adhesives
Description
Part Number
92-825407A3
92-34227--1
Quicksilver 2-4-C Marine Lubricant With
Teflon
Quicksilver Perfect Seal
Specifications
Cooling System Capacity
Thermostat
9 (8.5)
143° F (62° C)
14 psi (97 kPa)
Cap Pressure
Description
There are several configurations of this cooling system, but the operation is essentially iden-
tical. Basically, the system is composed of two separate subsystems: the seawater system
and the closed cooling system. The seawater system is similar in function to the fan used
in an automobile because it absorbs heat (from the closed cooling system) as it passes
through the heat exchanger. The closed cooling system is similar in function to the rest of
the cooling system in an automobile.
The coolant recovery system keeps the reservoir full. Normal coolant overflow into recovery
bottle is approximately 1/2 pint (230 ml) during warm-up. The coolant recovery system
draws coolant back into the reservoir from the recovery bottle as the engine cools. As long
as there is coolant in the recovery bottle, the reservoir should remain completely full. If not,
there’s a vacuum leak, usually at the hose leaving the reservoir, or the gasket under the
recovery filler cap. The gasket seals against the outer rim of the filler neck.
IMPORTANT: The coolant (antifreeze) flows around the outside of the cooling tubes
while seawater flows through the inside of the cooling tubes in the heat exchanger.
Engine exhaust manifold is seawater cooled. Sterndrive seawater pickup pumps seawater
through the heat exchanger.
Index
Page 6B-2
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