OWNER’S/OPERATOR’S
MANUAL
17. TROUBLESHOOTING
17-2
STARTING FAILURE/ HARD STARTING
FUEL SYSTEM
Fuel tank
Auto choke
Empty
Starter plunger malfunction
Clogged fuel tank breather hole
Wax malfunction
Fuel pump is clogged
Deteriorated fuel or fuel containing
water or foreign material
Electric fuel injection Air cleaner
ECU failure or wiring faulty
Clogged air cleaner element
Nozzle clogging or failure
Improper air cleaner setting
Throttle position sensor failure
EFI relay does not work
COMPRESSION SYSTEM
Cylinder and cylinder head Valve system
Loose spark plug
Improperly adjusted valve clearance
Loose cylinder head
Improperly sealed valve
Broken cylinder head gasket
Improperly contacted valve and vale
Broken cylinder gasket seat
Worn, damaged or seized cylinder
Improper valve timing
Piston and Piston ring
Broken valve spring
Worn piston
Seized valve
Worn fatigued or broken piston ring
Seized piston ring
Seized or damaged piston