Mercury MerCruiser MCM 454 Mag MPI User Manual

TROUBLESHOOTING
SERVICE MANUAL NUMBER 23
Page 1C-17
90-861326--1 MARCH 1999
Camshaft Area
Location Possible Causes
Crankshaft timing sprocket
Camshaft area, front of engine, timed to
Timing chain
g
one half engine speed
Valve Lifter
Cam Bearings
C h ft t f i ti d t
Fuel Pump
Camshaft area, center of engine, timed to
one half en
g
ine speed
Valve Lifter
g
Cam bearing
C h ft f i ti d t
Distributor gear
Camshaft area, rear of engine, timed to
one half en
g
ine speed
Valve lifter
g
Cam bearings
C h ft th h t i ti d
Loss of oil pressure
Camshaft area, throughout engine, timed
to one half en
g
ine speed
Valve lifters
g
Cam bearings
Crankshaft Area
Location Possible Causes
Crankshaft timing sprocket
Crankshaft area, front of engine, timed to
Timing chain
g
engine speed
Main bearing
Rod bearing
C k h ft t f i ti d
Crankshaft striking pan or pan baffle
C
ran
k
s
h
a
f
t area, center o
f
eng
i
ne, t
i
me
d
to en
g
ine speed
Main bearing
to
engine
s eed
Rod bearing
Loose flywheel cover
Ckhft f i tidt
Loose coupler
C
ran
k
s
h
a
f
t area, rear o
f
eng
i
ne, t
i
me
d
to
en
g
ine speed
Loose flywheel
engine
s eed
Main bearing
Rod bearing
C k h ft th h t i ti d
Loss of oil pressure
C
ran
k
s
h
a
f
t area, t
h
roug
h
out eng
i
ne, t
i
me
d
to en
g
ine speed
Main bearings
to
engine
s eed
Rod bearings
Downloaded from https://needmanual.com/!
IndexIndex

Mercury MerCruiser MCM 454 Mag MPI Specifications

General

Brand	Mercury
Model	MerCruiser MCM 454 Mag MPI
Category	Engine
Language	English