Troubleshooting; Engine Does Not Start Or Is Hard To Start - Honda VT600C Shadow VLX Service Manual

E N G I N E DO ES NOT START O R I S
H A R D TO START
E N G I N E LACKS PO W E R
PO O R PERFO RM A N C E AT LOW A N D
I D L E S P E E D S
E N G I N E DOES NOT START OR IS HARD TO START
1 . Check fuel flow to carburetor
REAC H I N G CARBURETOR
2. Perform spark test
SPARK
1
3 . Test cylinder compression
C O M PRESSION NORMAL
l
Sta by fol lowing no,mal pmcedu"
4 .
E N G I N E DOES NOT FIRE
l
5 . Sta with choke applied
20. TROUBLESHOOTI NG
POO R PERFO R MANCE AT H I G H
20- 1 SPEED
20-2 POO R H A N D L I N G
20-3
N OT REAC H I N G CARBU RETO R --- ·• Fuel tank empty
WEAK OR NO SPARK ---- --• ·• GO TO PAG E 1 6-2
WET PLUG ---- -- -- -- ·• Mixture too rich
LOW COMPRESSION ---- --+ • Improper valve clearance (too small )
E N G I N E STARTS BUT STOPS ---• • Improper choke operation
POSSIBLE CAUSE
• Clogged fuel line or fuel filter
• Sticking float valve
• Faulty fuel pump
• Faulty fuel pump relay
• Clogged fuel tank vent hole
• Loose or disconnected fuel pump
relay wire
• Carburetor flooded
• Carburetor choke on, or partially
closed
• Cylinder flooded
• Air cleaner dirty
• Valve stuck open
• Worn cylinder and piston rings
• Damaged cylinder head gasket
• Seized valve
• Improper valve timing
• I mproper valve and seat contact
• Carburetor incorrectly adjusted
• I ntake pipe leaking
• Improper ignition timing
( Faulty spark u nit or pulse gener­
ator)
• Fuel contaminated
20-4
20-4
20- 1