Ignition transformer and spark quality: what to check during service

The ignition transformer generates the high voltage required for the spark at the electrodes. Spark quality is critical for reliable startup.

Visual inspection

High-voltage cables, insulation, connections, and any signs of leakage or carbon tracking are checked.

Spark stability

The spark must be repeatable and appear at the correct point between the electrodes.

Electrodes

Incorrect gap or a worn insulator can put a strain on the ignition system.

Safety

High-voltage checks should only be performed by a qualified technician using the prescribed isolation procedures.