Troubleshooting - Honda C8R600F4 Service Manual

22. TROUBLESHOOTING
ENGINE DOES NOT START OR IS
HARD TO START
ENGINE LACKS POWER
POOR PERFORMANCE AT LOW
AND IDLE SPEED
22-1
22-2
POOR PERFORMANCE AT HIGH
SPEED
POOR HANDLING
ENGINE DOES NOT ST ART OR IS HARD TO ST ART
Possible cause
1. Check the fuel flow to carburetor---- Not reaching carburetor - - - - •Clogged fuel line and filter
I •
Clogged fuel tank breather tube
Reaching carburetor •Sticking float valve
i •
Faulty fuel pump
2. Perform a spark test - - - - - - - - Weak or no spark - - - - - - • Faulty spark plug
j • Fouled spark plug
Guuu
::.pa1
k. • Loose or disconnected ignition
system wires
• Faulty ignition pulse generator
•Faulty ignition coil
•Faulty ignition control module (ICM)
•Faulty engine stop switch
• Faulty ignition switch
3. Remove and inspect spark plugs Wet p l u g - - - - - - - - - - • Flooded carburetor
I
•Starting enrichment (SE) valve ON
Good condition position (open)
• Dirty air cleaner
j
•Throttle valve open
4. Start by followinq normal procedure--- Engine starts but stops------• Improper choke operation
I
•Incorrectly adjusted carburetor
•Leaking carburetor insulator
Engine does not start •Improper ignition timing (Faulty ICM
•Contaminated fuel
l
or ignition pulco gene rotor)
5. Test cylinder compression Low compression
•Valve stuck open
•Worn cylinder and piston rings
• Damaged cylinder head gasket
• Seized valve
• Improper valve timing
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