Polaris 2004-2005 Sportsman 6x6 Service Manual page 112

Cylinder head gasket leak
S
No valve clearance
S
adjusted
Cylinder or piston worn
S
Piston rings worn, leaking, broken, or
S
sticking
Bent valve or stuck valve
S
Valve spring broken or weak
S
Valve not seating properly (bent or
S
carbon accumulated on sealing surface)
Rocker arm sticking
S
Backfiring
ETC or speed limiter system malfunction
S
Fouled spark plug or incorrect plug or
S
plug gap
Carburetion faulty - lean condition
S
Exhaust system air leaks
S
Ignition system faulty:
S
Spark plug cap cracked/broken
Ignition coil faulty
Ignition or kill switch circuit faulty
Ignition timing incorrect
Sheared flywheel key
Poor connections in ignition system
S
System wiring wet
S
Valve sticking
S
Air leaks in intake
S
Lean condition
S
COOLING SYSTEM
TROUBLESHOOTING
Overheating
Low coolant level
S
Air in cooling system
S
Wrong type of coolant
S
Faulty pressure cap or system leaks
S
Restricted system (mud or debris in
S
radiator fins or restriction to air flow,
passages blocked in radiator, lines,
pump, or water jacket)
Lean mixture (restricted jets, vents, fuel
S
pump or fuel valve)
Fuel pump output weak
S
Restricted radiator (internally or cooling
S
fins)
Water pump failure
S
Cooling system restriction
S
Cooling fan inoperative or turning too
S
slowly (perform current draw test)
3.54
or incorrectly
Temperature Too Low
Leak at Water Pump Weep Hole
GENERAL INFORMATION
Ignition timing misadjusted
S
Low oil level
S
Spark plug incorrect heat range
S
Faulty hot light circuit
S
Thermostat stuck closed or not opening
S
completely
Thermostat stuck open
S
Faulty water pump mechanical seal
S
(coolant leak)
Faulty pump shaft oil seal (oil leak)
S