mxu 400 Manuel atelier : Page 103

             A. If the meter shows battery voltage, troubleshoot
      the gear shift position switch connector or the
      gear shift position switch.                                   Ignition Timing
   B. If the meter does not show battery voltage,
      inspect the LIGHTS fuse, ignition switch, or
      the main wiring harness.                            The ignition timing cannot be adjusted; however, veri-
                                                          fying ignition timing can aid in troubleshooting other
                                                          components. To verify engine timing, see Section 2.




        Troubleshooting

Problem: Spark absent or weak
Condition                                            Remedy
 1. Ignition coil defective                           1. Replace ignition coil
 2. Spark plug defective                              2. Replace plug
 3. Magneto defective                                 3. Replace magneto
 4. CDI unit defective                                4. Replace CDI unit
 5. Pick-up coil defective                            5. Replace pick-up coil
Problem: Spark plug fouled with carbon
Condition                                            Remedy
 1. Mixture too rich                                  1. Adjust carburetor
 2. Idling RPM too high                               2. Adjust carburetor
 3. Gasoline incorrect
 4. Air cleaner element dirty
                                                      3. Change to correct gasoline
                                                      4. Clean element
                                                                                                                   5
 5. Spark plug incorrect (too cold)                   5. Replace plug
 6. Valve seals cracked - missing                     6. Replace seals
 7. Oil rings worn - broken                           7. Replace rings
Problem: Spark plug electrodes overheat or burn
Condition                                            Remedy
 1. Spark plug incorrect (too hot)                    1. Replace plug
 2. Engine overheats                                  2. Service cooling system
 3. Spark plug loose                                  3. Tighten plug
 4. Mixture too lean                                  4. Adjust carburetor
Problem: Magneto does not charge
Condition                                            Remedy
 1. Lead wires/connections shorted - loose - open     1. Repair - replace - tighten lead wires
 2. Magneto coils shorted - grounded - open           2. Replace magneto coils
 3. Regulator/rectifier defective                     3. Replace regulator/rectifier
Problem: Magneto charges, but charging rate is below the specification
Condition                                            Remedy
 1. Lead wires shorted - open - loose (at terminals)  1. Repair - tighten lead wires
 2. Stator coils (magneto) grounded - open            2. Replace stator coils
 3. Regulator/rectifier defective                     3. Replace regulator/rectifier
 4. Electrolyte low                                   4. Add distilled water
 5. Cell plates (battery) defective                   5. Replace battery




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