Honda CX500 1978 Shop Manual page 245

HONDA
CXSOO
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TROUBLESHOOTING
ENGINE DOES NOT START OR IS HARD TO START
SYMPTOM CHECK
PROBABLE CAUSE
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Check if engine is
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r ( l ) Faulty starting clutch
(2) Starter drive geariidle geat
damaged
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(1) No fuel in fuel tank
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Check if fuel i s reaching car-1
(2) clogged fuel tube or fuel
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buretor b y loosening drain
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filter
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screw
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(3)
Clogged float valve
Fuel reaching carburetor
(4) Clogged fuel tank cap
buretor breather hole
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Remove spark plugs and
(1) Faulty spark plug
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t r y spark test (2) Fouled spark plug
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(3) Faulty C.D.I. unit
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k 4 1 ~ r o k i n or shorted high
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Weak or no sparks
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tension cord
-(5)
Faulty A.C. generator
(6) Broken or shorted ignition
coil
-(I) Valve clearance too small
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L141 l m o r o ~ e r ignition timinq
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Test cylinder compression -(7)
Faulty main switch
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- ( I ) Choke excessively open
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Remove. spark plugs
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(C.O.I. unit or A.C. gene-
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rator at fault)
Wet (1
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Carburetor flooded
C ( 2 1 Carburetor choke excessively
-(2) Valve stuck open
(3) Worn cylinder and piston
rings
-(4) Damaged cylinder head
gasket
-(5) Seized valve
Compression normal
Engine does not fire
soon stops
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closed
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Restart with choke applied
(3) Throttle valve excessively
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opened
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Start by following normal
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-(6) Improper valve timing
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startino orocedure I
Loss of compression
-(2) Carburetor pilot screw
excessively closed
4 3 ) Air leaking past manifold
Date of Issue: January, 1978
OHONDA MOTOR CO.. LTD.
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