Suzuki DF25/DF30 Four Stroke Service Manual, Page 57Get this manual
3-6 ENGINE CONTROL
TESTING IGNITION SYSTEM
IGNITION TROUBLESHOOTING
Perform the following ignition system tests when engine is hard to start to determine if the cause is in the ignition or another system
Check spark conditionNo or weak sparks Check if the spark plug is in good condition(See page 2-8) OK Disconnect the engine stop switch wire (Green or BlueRed)No or weak sparks Check the ignition coil resistance(See page 3-7) [Primary: 0.17 0.23Secondary: 3.3 5.0 k] OK Check spark plug cap for any evidence of high-tension leakOK Check the spark plug cap resistance(See page 3-8) [Cap resistance: k] OK Check the Power source coil resistance(See page 3-8) [Coil resistance: 10.1 15.1OK Check the CKP sensor resistance(See page 3-9) [Sensor resistance: 148 222OK Not good Sparks Not good Sparks