Suzuki DF25/DF30 Four Stroke Service Manual, Page 58Get this manual
ENGINE CONTROL 3-7
CHECKING COIL RESISTANCE
Always disconnect the battery cable from battery before commencing electrical resistance check
IGNITION COIL
09930-99320Digital tester Tester range(Resistance)
Primary side 1Disconnect primary coil lead wires from CDI unit2Connect tester probe to coil lead wires as shownIgnition coil No.1 No.2 No.3 3Measure resistancePrimary coil resistance0.17 0.23 If measurement exceeds specification, replace ignition coilWhite Black