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Section 02 TROUBLESHOOTING
Subsection 01 (TROUBLESHOOTING CHART)
ENGINE OVERHEATS
OTHER OBSERVATION
POSSIBLE CAUSE
REMEDY
Coolant level low
Refill/check for leaks
Coolant leaking out of weep hole
(PTO housing)
Replace seal
Hoses or clamps missing/defective
Repair/replace
Cylinder head gasket leaks
(white exhaust gas)
Replace cylinder head gasket
Thermostat failure
Replace
Coolant pump failure
Replace
Coolant level too low
Internal passage blockage
Inspect and clean
Temperature sensor defective
Check/replace. Refer to ENGINE
MANAGEMENT
Worn water pump impeller
Check/replace
Cooling system restriction
Check/flush, refer to MAINTENANCE
Damaged ride plate or hoses
Check, refer to COOLING SYSTEM and
HULL/BODY
Monitoring beeper
sounds continuously
Thermostat defective
Check/replace
ENGINE SMOKE IN THE EXHAUST
OTHER OBSERVATION
POSSIBLE CAUSE
REMEDY
Coolant leak
Check/repair. Refer to COOLING
SYSTEM
Intercooler leak
(if so equipped)
Check/repair. Refer to the
1503 4-TEC
ENGINE SHOP MANUAL
Damaged cylinder head gasket
Check/replace cylinder head gasket
Water ingestion
Inspect intake manifold for water
infiltration
White smoke
Valve guide seals
Check/replace valve guide seals, refer
to CYLINDER HEAD in the
1503 4-TEC
ENGINE SHOP MANUAL
Oil level too high
Siphon excess of oil
Blue smoke
PTO oil scavenge port blocked or
scavenge pump malfunction
Inspect and clean or replace pump
Valve seals worn or damaged
Replace seals
Blue smoke at engine
starting
Oil rings worn out
Replace rings
Blue smoke with engine
under load
Oil rings
Inspect/repair oil rings, refer to CYLINDER
BLOCK in the
1503 4-TEC ENGINE
SHOP MANUAL
22
smr2005-006
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