25 584 15-S MDI Module Kohler – Genuine OEM Replacement Ignition Control Part25 584 15 S MDI Module Kohler Genuine OEM Replacement Ignition Control Part The Kohler 25 584 15 S MDI Module is a genuine OEM replacement ignition control component designed for select Kohler small engines. The MDI (Magneto Digital Ignition) module is responsible for controlling spark timing and ignition performance, ensuring reliable starting, smooth operation, and consistent engine power. This OEM ignition module is commonly replaced when engines