Troubleshooting - Suzuki GZ250 Service Manual

7-1 SERVICING INFORMATION

TROUBLESHOOTING

ENGINE
Complaint
Engine will not start, or
is hard to start.
s
Engine stalls easily.
Symptom and possible causes
Compression too low
1. Worn cylinder.
2. Worn piston ring.
3. Worn valve guide or improper valve seating.
4. Loose spark plug.
5. Broken, cracked or damaged piston
6. Slow cranking starter motor.
7. Mistimed valves.
8. Valve clearance out of adjustment.
Spark plug not sparking
1. Damaged spark plug.
2. Damaged spark plug cap.
3. Fouled spark plug.
4. Wet spark plug.
5. Defective ignition coil.
6. Open or short in high-tension cord.
7. Defective pick-up coil or ignitor unit.
No fuel reaching the carburetor
1. Clogged or defective fuel val ve.
2. Defective carburetor needle valve.
3. Clogged fuel hose.
4. Clogged fuel filter.
1. Fouled spark plug.
2. Defective pick-up coil or ignitor unit.
3. Clogged fuel hose.
4. Clogged carburetor jet.
5. Valve clearance out of adjustment.
Remedy
Rebore or replace.
Replace.
Repair or replace
Tighten.
Replace
See electrical section.
Adjust.
Adjust.
Replace.
Replace.
Clean or replace.
Clean and dry or replace.
Replace.
Replace.
Replace.
Clean or replace. Replace
with carburetor needle valve
seat. Clean or replace.
Clean or replace.
Clean or replace.
Replace.
Clean.
Clean.
Adjust.