ENGINE
3.60
TROUBLESHOOTING, CONT
Piston Failure - Scoring
S
Lack of lubrication
S
Dirt entering engine through cracks
in air filter or ducts
S
Engine oil dirty or contaminated
Excessive Smoke and Carbon Buildup
S
Excessive piston-to-cylinder
clearance
S
Wet sumping
S
Worn rings, piston, or cylinder
S
Worn valve guides or seals
S
Restricted breather
S
Air filter dirty or contaminated
Low Compression
S
Cylinder head gasket leak
S
No valve clearance ( cam wear )
S
Cylinder or piston worn
S
Piston rings worn, leaking, broken,
or sticking
S
Bent valve or stuck valve
S
Valve spring broken or weak
S
Valve not seating properly (bent or
carbon accumulated on sealing
surface)
S
Rocker arm sticking
Backfiring
S
ETC or speed limiter system
malfunction
S
Fouled spark plug or incorrect plug
or plug gap
S
Exhaust system air leaks
S
Ignition system faulty:
Spark plug cap cracked/broken
Ignition coil faulty
Ignition or kill switch circuit faulty
Ignition timing incorrect
Sheared flywheel key
S
Poor connections in ignition system
S
Valve sticking
S
Air leaks in intake
S
Lean condition
COOLING SYSTEM
TROUBLESHOOTING
Overheating
S
Low coolant level
S
Air in cooling system
S
Wrong type/mix of coolant
S
Faulty pressure cap or system
leaks
S
Restricted system (mud or debris in
radiator fins causing restriction to
air flow, passages blocked in
radiator, lines, pump, or water
jacket, accident damage)
S
Lean mixture (restricted jets, vents,
fuel pump or fuel valve)
S
Fuel pump output weak
S
Electrical malfunction
S
Water pump failure/ Loose impeller
S
Thermistor failure
S
Cooling fan inoperative or turning
too slowly (perform current draw
test)
S
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 completely
Temperature Too Low
S
Thermostat stuck open
Leak at Water Pump Weep Hole
S
Faulty water pump mechanical seal
(coolant leak)
S
Faulty pump shaft oil seal (oil leak)
Summary of Contents for Sportsman 800 Efi 2005
Page 116: ...ENGINE 3 62 NOTES ...
Page 136: ...FUEL SYSTEM FUEL INJECTION 4 20 NOTES ...
Page 186: ...CLUTCH 6 30 NOTES ...
Page 256: ...BRAKES 9 24 NOTES ...
Page 292: ...ELECTRICAL 10 36 BASIC WINCH WIRING 2005 ATV MODELS 2005 ATV WINCH WIRING DIAGRAM ...
Page 300: ...ELECTRICAL 10 44 NOTES ...
Page 301: ...ELECTRICAL 10 39 WIRING DIAGRAM 2005 SPORTSMAN 700 800 EFI Stator ...
Page 302: ...ELECTRICAL 10 40 WIRING DIAGRAM 2005 SPORTSMAN 700 800 EFI ...