Engine Does Not Start Or Is Hard To Start - Honda CX650C 1983 Shop Manual

ENGINE DOES NOT START
OR IS HARD TO START
22-1
ENGiNE LACKS POWER, 22-2
POOR PERFORMANCE AT LOW SPEEDS 22-3
POQR PERFORMANCE AT HlGH SPEED
POQR HANDLING
ENGINE DOES NOT START 0 8 IS HARD TO START
1. Check fuel flow to carburetor. NOT REACHING CARBURETOR
REACHING CARBURETOR
9
2. Perform spark test.
GOOD SPARK
3. Test cylinder compression.
COMPRESSION NORMAL
4. Start by following normal
procedure.
ENGINE DOES NOT F I R E
WEAK OR NO SPARK
POSSIBLE CAUSES
+
(1 ) Fuel tank empty.
(2) Clogged fuel tube or fuel filter.
(3) Sticking float valve.
(4) Clogged fuel tank cap breather
hole.
(5)
Faulty fuel valve diaphragm.
(6) Clogged fuel valve vacuum and
air vent tube.
Faulty spark plugs.
Fouled spark plugs.
Faulty spark unit.
Broken or shorted high tension
wires.
Broken or shorted ignition coil.
Faulty ignition switch.
Faulty pulse generator.
Low battery charge.
LOW COMPRESSION
- - -
(1
)
lrnproper valve clearance.
(2)
Valve stuck open.
(3) Worn cylinder and piston rings.
(4) Damaged cylinder head gasket.
(5) Seized valve.
(6) lmproper valve timing.
ENGINE FIRES BlJT STOPS
- -
( 1 )
Improper choke operation.
(2)
Carburetor incorrectly adjusted.
(3) Intake pipe leaking.
(4) lmproper ignition timing
(Spark unit or pulse generator).
(5) Incorrect fast idle.
(6) Fuel contaminated.
WET PLUG
- -
- - . - - p - -
rs-.
( l
) Carburetor flooded.
(2) Choke closed.
(3) Throttle valve open.
(4) Air cleaner dirty.
Date of Issue: December, 1982
O
HONDA MOTOR CO., LTD.