SERVICE MANUAL NUMBER 26
TROUBLESHOOTING
Valve Cover Area
Location
Possible Causes
A. Rocker arm striking valve cover
Valve cover area, timed to one-half engine B. Rocker arm out of adjustment
speed, noise could be confined to one
cylinder or may be found in any multitude
C. Worn rocker arm
of cylinders
D. Bent push rod
E. Collapsed filter
Cylinder Area
Location
Possible Causes
A. Sticking valve
B. Carbon build-up
C. Connecting rod installed wrong
D. Bent connecting rod
E. Piston
Cylinder area, may be confined to one
cylinder or found in more than one
cylinder, timed to engine speed
F. Piston rings
G. Piston pin
H. Cylinder worn
Camshaft Area
Location
Possible Causes
A. Crankshaft timing sprocket
B. Timing chain
C. Fuel Pump
Camshaft area, front of engine,
timed to one half engine speed
D. Valve Lifter
E. Cam Bearings
A. Fuel Pump
Camshaft area, center of
engine, timed to one half
engine speed
B. Valve Lifter
C. Cam bearing
A. Distributor gear
B. Valve lifter
Camshaft area, rear of engine,
timed to one half engine speed
C. Cam bearings
A. Loss of oil pressure
B. Valve lifters
C. Cam bearings
Camshaft area, throughout
engine, timed to one half
engine speed
Index
90-861329--1
MARCH 1999
Page 1C-23
| 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