Starting Problems; Engine; Fuel System - Yamaha XV1600A1999 Service Manual

EAS00844
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 procedure 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)
S Loose spark plug
S Loose cylinder head or cylinder
S Damaged cylinder head gasket
S Damaged cylinder gasket
S Worn or damaged cylinder
S Incorrect valve clearance
S Incorrectly sealed valve
S Incorrect valve-to-valve-seat contact
S Incorrect valve timing
S Faulty valve spring
S Seized valve
Pistons and piston rings (See page 5-53 to
5-59)
S Incorrectly installed piston ring
S Damaged, worn, or fatigued piston ring
S Seized piston ring
S Seized or damaged piston
Air filter (See page 3-7 and 3-29)
S Incorrectly installed air filter
S Clogged air filter element
Crankcase and crankshaft (See page 5-100
to 5-107 and 5-114 to 5-121)
S Incorrectly assembled crankcase
S Seized crankshaft
STARTING PROBLEMS
TROUBLESHOOTING

FUEL SYSTEM

Fuel tank (See page 3-6)
S Empty fuel tank
S Clogged fuel filter
S Clogged fuel strainer
S Clogged fuel tank breather hose
S Clogged rollover valve
S Clogged rollover valve hose
S Deteriorated or contaminated fuel
Fuel pump (See page 7-46 to 7-50)
S Faulty fuel pump
S Faulty fuel pump relay
Fuel cock (See page 6-19 to 6-20)
S Clogged or damaged fuel hose
Carburetor (See page 6-1 to 6-20)
S Deteriorated or contaminated fuel
S Clogged pilot jet
S Clogged pilot air passage
S Sucked-in air
S Damaged float
S Worn needle valve
S Incorrectly installed needle valve seat
S Incorrect fuel level
S Incorrectly installed pilot jet
S Clogged starter jet
S Faulty starter plunger
S Incorrectly adjusted starter cable
8-1
TRBL
SHTG