Troubleshooting; Engine Does Not Start Or Is Hard To Start - Honda rebel 250 Service Manual

20.
TROUBLESHOOTING
ENGINE
DOES
NOT
START OR
IS
HARD TO
START
20-1
POOR PERFORMANCE
AT
HIGH
SPEED
20-4
ENGINE LACKS
POWER
20-2
POOR
HANDLING
20-4
POOR PERFORMANCE
AT
LOW
AND
IDLE
SPEED
20-3
ENGINE DOES
NOT
START
OR
IS
HARD
TO START
1.
Check
the
fuel
flow to carburetor
Reaching Carburetor
'
2.
Perform a
spark
test
Good
Spark
Not Reaching
Carburetor
Possible
Cause
'
Clogged
fuel tube
or
fuel strainer
screen
•
Sticking
float
valve
•
Clogged
fuel
tank breather
Weak
Or
No
Spark
Faulty spark plug
Fouled spark plug
Faulty ignition control
module
Broken
or
shorted spark plug wire
Broken
or shorted
ignition coil
Faulty ignition
switch
Faulty ignition
pulse generator
Faulty exciter
coil
Faulty engine stop switch
Loose
or
disconnected
ignition
system
wires
3.
Test
cylinder
compression
*
Low
Compression
Compression Normal
Valve stuck
open
Worn
cylinder
and
piston
ring
Leaking/damaged
cylinder
head
gasket
Seized valve
Improper
valve timing
A.
Start
by
following
normal procedure Engine
Starts
But Stops
Engine Does Not
Fire
5.
Remove
end
inspect spark plug
Wet
Plug
Improper choke
operation
Carburetor incorrectly adjusted
Intake
pipe
leaking
Improper
ignition
timing
iFaulty
ignition
coll or
ignition pulse
generator)
Fuel
contaminated
Flooded carburetor
Choke
closed
Throttle valve
open
Air
cleaner
dirty
20-1