SERVICE MANUAL NUMBER 26
MANIFOLD
Removal
1.
2.
3.
4.
5.
Disconnect battery cables from battery.
Drain water from cylinder block, exhaust manifold and exhaust elbow.
Disconnect throttle cable at carburetor.
Disconnect exhaust hose and cooling hoses.
Disconnect fuel line at carburetor.
WARNING
Gasoline is extremely flammable and highly explosive under certain conditions. Be
sure electrical source to engine is disconnected. Do not smoke or allow sources of
spark or open flame in area when installing new pump. Wipe up any spilled fuel
immediately.
6.
Disconnect crankcase ventilation hose at rocker arm cover.
Disconnect wires connected to electric choke.
7.
8.
9.
Remove exhaust manifold fasteners; remove manifold assembly and discard gaskets.
Remove exhaust elbow.
Cleaning and Inspection
1.
2.
Clean gasket material from all surfaces and wash parts in solvent.
Inspect all parts carefully. Machined surfaces must be clean and free of all marks and
deep scratches, or water and exhaust leaks may result.
3.
4.
Check water passages for foreign material. Passages must be clean for efficient cooling.
If more thorough inspection is desired, pipe plugs may be removed from exhaust
manifold and exhaust elbow.
IMPORTANT: If plugs are removed, coat threads with Perfect Seal before reinstalling.
IMPORTANT: If manifold to cylinder head studs have broken, install all new studs with
Loctite 27131 AFTER checking head and manifold surfaces for warpage. Also use all
new manifold attaching nuts.
5.
6.
Check for cracks.
To test manifold body for leaks, block off plates, plugs or short hoses with plugged ends
must be used. One block off plate must have a threaded hole for attaching compressed
air hose. Use new gaskets when installing block off plate(s). Apply 40 psi (276 kPa) of
air pressure and submerge manifold in water. Air bubbles will indicate a leak.
90-861329--1
MARCH 1999
Page 7A-3
INDEX
| 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