Sym X'PRO RV125 User Manual

1. GENERAL INFORMATION
1-12
Troubleshooting-Carburetor model
A. Engine hard to start or can not be started
Check and adjustment Failure condition Possible causes
Loosen carburetor drain bolt
to check if there is gasoline
inside the carbureto
r
.
Fuel supplied to
carburetor sufficient.
No fuel is supplied to
carburetor.
Remove spark plug, install it
into spark plug cap, and
perform a spark test against
engine ground.
Perform cylinder compression
pressure test.
Check if sparks Weak sparks, no
s
p
ark at all.
Cylinder compression
pressure normal.
Low compression
pressure or no
pressure.
Re-start by following the
starting procedures.
No ignition
There are some signs of
ignition, but engine can
not be started.
Remove the spark plug again
and check it.
Remove carburetor after 30
minutes and connect a hose
onto fuel rich circuit. Then
blow the hose with air.
Dry spark plug Wet spark plug
Blowing in normal Blowing clogged
1. No fuel in fuel tank
2. Check if the pipes, fuel tank to carburetor
and intake vacuum, are clogged.
3. Float valve clogged
4. Lines in fuel tank evaporation system
clogged
5. Malfunction of fuel pump
6. Loosen or damaged fuel pump vacuum
hose
7. Fuel filter clogged
1. Malfunction of spark plug
2. Spark plug foul
3. Malfunction of CDI set
4. Malfunction of AC generator
5. Ignition coil is in open or short circuit
6. Ignition coil leads open or short circuit
7. Malfunction of main switch
1. Piston ring seized
2. Malfunction of cylinder valves
3. Worn cylinder and piston ring
4. Cylinder gasket leak
5. Sand hole in compression parts
1. Malfunction of throttle valve operation
2. Air sucked into intake manifold
3. Incorrect ignition timing
1. Fuel level in carburetor too high
2. Malfunction of throttle valve operation
3. Throttle valve opening too wide
1. Malfunction of automatic by- starter
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Sym X'PRO RV125 Specifications

General

Brand	Sym
Model	X'PRO RV125
Category	Scooter
Language	English