TGB BLADE 500, Service Manual

Page: 22 / 306

1. GENERAL INFORMATION
1-17
D. Engine runs sluggish (High speed)
Check and adjustment Fault condition Probable causes
Check for fuel supplying
system in automatic fuel cup
Good Abnormal
Check if carburetor clogged
No clogged Clogged
Normal Abnormal
Check ignition timing
●
Malfunction of CDI
●
Malfunction of AC alternator
●
Insufficient fuel in fuel tank
●
Fuel filter clogged
●
Restricted fuel tank vent
●
Cleaning
●
Spark plug fouled
●
Malfunction of Ignition coil
●
Malfunction of AC generator
●
Malfunction of ignition coil
●
Open or short circuit in spark plug
leads
●
Malfunction of main switch
No air sucked Air sucked
Good spark Poor
Remove spark plug, install
spark plug into spark plug cap
and perform spark test against
engine ground
●
Poor heat insulation gasket
●
Carburetor lock loose
●
Poor intake gasket
●
Poor carburetor O-ring
●
Vacuum hose crack
Air sucked through carburetor
gasket
Adjust the airscrew of
carburetor
Check ignition timing (using
ignition lamp)
Good Poor
Normal Abnormal
●
Incorrect ignition timing (malfunction
of Ignition Coil or AC alternator)
●
Rich mixture (loosen the screw)
●
Lean mixture (tighten the screw)
Check and adjustment Fault condition Probable causes