broken
Faulty pick up coil
Fuel system
Clogged fuel tank breather hole
Clogged air cleaner element
Clogged jet
Improperly adjusted fuel level
Improper carburetor air vent hose Faulty valve timing
setting
17. TROUBLE SHOOTING
OVER HEATING OR OVER-COOLING
OVER HEATING
Ignition system
Improperly spark plug gap
Improper spark plug heat rang
Faulty igniter unit
Fuel system
Improper carburetor setting
Improper fuel level adjustment
Clogged air cleaner element
Compression system
OWNER'S/OPERATOR'S MANUAL
ATV300-D T3b
OVER-COOLING
- 119 -
Cylinder gasket broken
Carbon deposit buildup
Improper adjusted valve
clearance
Improper contacted
valve and valve seat
Clutch
Refer to ―CLUTCH SLIPPING
/DRAGGING‖ section
Engine oil
Improper oil level(low or
over Oil level)
Ignition system
Faulty spark plug
Faulty high tension cord
Faulty ignitor unit
Faulty pick up coil
Faulty ignition coil
Valve system
Improperly adjusted valve
clearance
Cooling system
Faulty thermostat
Faulty thermo switch
16.0