![background image](http://html1.mh-extra.com/html/daelim/besbi-sc125/besbi-sc125_service-manual_3160979180.webp)
19-2
TROUBLESHOOTING
ENGINE STALLS, HARD TO START, ROUGH IDLING
CAUSE OF TROUBLE
No fuel to fuel tank.
Clogged fuel tube.
Clogged float valve.
Clogged fuel tank cap.
Clogged fuel strainer.
Disconnected or damaged fuel pump
negative pressure tube.
Contaminated spark plug.
Using spark plug with an incorrect
heat range.
Faulty or contaminated spark plug.
Faulty A.C generator.
Faulty ignition coil.
Disconnected or short high tension cord.
Faulty ignition switch.
Faulty pluse generator.
Faulty CDI unit.
Worn cylinder or piston ring.
Leaking cylinder gasket.
Faulty valve clearance adjustment.
Faulty A.C generator.
Faulty CDI unit.
Lean fuel mixture.
Rich fuel mixture.
Faulty carburetor insulator tightening.
Faulty carburetor insulator O-ring.
Faulty insulator band tightening.
Faulty insulator.
Lean fuel mixture.
Rich fuel mixture.
Slow circuit clogged.
Open the drain screw, and check fuel
flow to the carburetor.
Check the spark plug.
Insert the plug into cap, and check
sparks.
Measure the cylinder compression.
(Using a compression gauge.)
Check the ignition timing.
Check the carburetor pilot screw
Check the intake air leak in the
connection part of carburetor insulator.
Check for continuity between auto
bystarter terminals.
Remove the auto bystarter from the
carburetor, check the starter valve.
Starter valve operates normally.
Continuity
Not leak
Adjustment normal
Correct
Compression normal
Sparks normal
Not contaminated or not discolored
Fuel is supplied
Fuel not supplied to
the carburetor.
Contaminated or
discolored.
Weak or intermittent
sparks.
Low or no cylinder
compression.
Incorrect
Misadjustment
Leak
No continuity
Starter valve won’t
operate.
Summary of Contents for BESBI SC125 -
Page 1: ......
Page 36: ...MEMO...
Page 56: ...MEMO...
Page 60: ...7 0 LH CRANKCASECOVER KICKSTARTER CONTINUOUSLYVARIABLE TRANSMISSION...
Page 77: ...MEMO...
Page 78: ...8 0 A C GENERATOR STARTER CLUTCH...
Page 87: ...MEMO...
Page 88: ...9 0 CYLINDER HEAD VALVES...
Page 104: ...10 0 CYLINDER PISTON...
Page 111: ...MEMO...
Page 112: ...11 0 TRANSMISSION CRANKSHAFT CRANK CASE...
Page 123: ...MEMO...
Page 124: ...MEMO...
Page 136: ...MEMO...
Page 144: ...MEMO...
Page 164: ...MEMO...
Page 178: ...MEMO...
Page 184: ...MEMO...
Page 185: ...20 WIRING DIAGRAM G Gr B G O Lb Lb I GNI TI ON SWI TCH G O COMBI MERER ASS Y...
Page 186: ...I GNI TI ON SWI T CH FUEL UNI T ENGI NE STOP SWI T CH PASS...
Page 187: ...SERVICEMANUAL 2007 09 PRINTED 2007 09 PUBLICATION...
Page 188: ......