Mercury 305 CID - Cylinder Area; Camshaft Area

TROUBLESHOOTING - 1C-1990-823225--1 1096
Cylinder Area
Location Possible Causes
C li d b fi d li d
Sticking valve
C li d b fi d li d
Carbon build-up
C li d b fi d li d
Connecting rod installed wrong
Cylinder area, may be confined to one cylinder
or found in more than one cylinder timed to
Bent connecting rod
or
found
in
more
than
one
cylinder
,
timed
to
engine speed
Piston
Piston rings
Piston pin
Cylinder worn
Camshaft Area
Location Possible Causes
Chf f fiid hlf
Crankshaft timing sprocket
C h ft f t f i ti d t h lf
Timing chain
Camshaft area, front of engine, timed to one half
engine speed
Fuel Pump
engine speed
Valve Lifter
Cam Bearings
C h ft t f i ti d t h lf
Fuel Pump
Camshaft area, center of engine, timed to one half
engine speed
Valve Lifter
engine speed
Cam bearing
C h ft f i ti d t h lf
Distributor gear
Camshaft area, rear of engine, timed to one half
engine speed
Valve lifter
engine speed
Cam bearings
C h ft th h t i ti d t
Loss of oil pressure
Camshaft area, throughout engine, timed to one
half engine speed
Valve lifters
half engine speed
Cam bearings