Westerbeke ATOMIC 4 Operation And Maintenance Manual page 74

Trouble
Sludge in oil
Loss of RPM
(Engine)
Loss of RPM
(Boat or associated
equipment)
Vibration
Pre-ignit ion
Misfiring
Backfiring
Table
6
TROUBLE SHOOTING PROCEDURES
(Cont. )
Probable Cause
Infrequent oil changes
Water in oil
Dirty oil filter
Obstructed fuel line, air
leak in fuel line,dirty fil-
ter or air cleaner,defective
fuel pump or carburetor out
of adjustment
Fouled or broken spark
plugs,distributor points out
of adjustment, or incorrect
timing
Valve tappets out of adjust-
ment,warped or burned valves,
worn piston rings,too heavy
lubricating oil or leaking
cylinder head gasket
Damaged propeller
Bent rudder
Misalignment
Too tight stuffing box pack-
ing gland
Dirty boat bottom
Misfiring or pre-ignition
Loose foundation or founda-
tion bolts
Propeller shaft out of line
or bent
Propeller bent or pitch out
of true
Defective spark plugs
Improper timing
Engine carbon
Engine overheating
Defective spark plugs, im-
properly adjusted distribu-
tor pOints, or defective
wirine:
Insufficient fuel reaching
engine due to dirty lines,
strainer or blocked fuel
tank vent. Water in fuel.
Poorly adjusted distributor
-63-
Correction
Drain and refill with proper weight oil
Drain and refill. If trouble persists,
check for cracked block, defective head
gasket and cracked head
Replace filter
Correction of these difficulties is
covered under "Engine will not start"
portions of this table
Correction of these difficulties is
covered under "Engine will not start"
portions of this table
Correction of these difficulties is
covered under
"Engin~
will not start"
portions of this table
See correction under misfiring and pre-
ignition
Check all spark plugs for broken por-
celain, burned electrodes or electrodes
out of adjustment. Replace all defec-
tive plugs or clean and reset.
See Par. 1, 2 and
5,
Sec. VI.
Remove cylinder head and clean out
carbon
See correction under "Engine Overheating"
portion of this table.
See correction under "Engine will not
start" portions of this table
See correction under "Engine will not
start" portions of this table.
See correction under "Engine will not
start" port ions of this table.