Service manual

TRBL
SHTG
8 - 1
STARTING PROBLEMS
EAS00844
TROUBLESHOOTING
NOTE:
The following guide for troubleshooting does not cover all the possible causes of trouble. It
should be helpful, however, as a guide to basic troubleshooting. Refer to the relative proce-
dure in this manual for checks, adjustments, and replacement of parts.
STARTING PROBLEMS
ENGINE
Cylinders and cylinder heads (See page
5-39 to 5-43 and 5-53 to 5-59)
• Loose spark plug
• Loose cylinder head or cylinder
• Damaged cylinder head gasket
• Damaged cylinder gasket
• Worn or damaged cylinder
• Incorrect valve clearance
• Incorrectly sealed valve
• Incorrect valve-to-valve-seat contact
• Incorrect valve timing
• Faulty valve spring
• Seized valve
Pistons and piston rings (See page 5-53 to
5-59)
• Incorrectly installed piston ring
• Damaged, worn, or fatigued piston ring
• Seized piston ring
• Seized or damaged piston
Air filter (See page 3-7 and 3-29)
• Incorrectly installed air filter
• Clogged air filter element
Crankcase and crankshaft (See page 5-100
to 5-107 and 5-114 to 5-121)
• Incorrectly assembled crankcase
• Seized crankshaft
FUEL SYSTEM
Fuel tank (See page 3-6)
• Empty fuel tank
• Clogged fuel filter
• Clogged fuel strainer
• Clogged fuel tank breather hose
• Clogged rollover valve
• Clogged rollover valve hose
• Deteriorated or contaminated fuel
Fuel pump (See page 7-46 to 7-50)
• Faulty fuel pump
• Faulty fuel pump relay
Fuel cock (See page 6-19 to 6-20)
• Clogged or damaged fuel hose
Carburetor (See page 6-1 to 6-20)
• Deteriorated or contaminated fuel
• Clogged pilot jet
• Clogged pilot air passage
• Sucked-in air
• Damaged float
• Worn needle valve
• Incorrectly installed needle valve seat
• Incorrect fuel level
• Incorrectly installed pilot jet
• Clogged starter jet
• Faulty starter plunger
• Incorrectly adjusted starter cable
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