New Mercury & Mariner Outboard CDMs (Capacitor Discharge Module)

The CDM (Capacitor Discharge Module) available at OBParts is a critical ignition component for outboard engines, engineered to deliver consistent, high-energy sparks for efficient combustion. This module stores electrical energy in a capacitor. It discharges it rapidly into the ignition coil at the precise moment, ensuring a strong spark delivery ideal for both two-stroke and four-stroke motors. By facilitating faster voltage rise and improved cold-start performance compared to traditional inductive systems, the CDM supports smoother engine operation and reliable ignition timing.