Black Box 582474 0582901

Function and Technical Context

The ignition black box is the central electronic component of the ignition system in OMC outboard engines, responsible for managing and controlling the electrical signals that activate the coils and determine the exact timing of ignition in each cylinder. It operates within the capacitive discharge ignition (CDI) circuit, coordinating information from the crankshaft position sensor to ensure precise spark in each combustion cycle. Its correct operation is essential to maintain engine power, throttle response, and efficient fuel consumption; if this module fails, the engine may experience erratic starting, total spark loss, or unexpected shutdown while underway. This unit replaces OMC references 582474, 582864, 582901, and 763790, being compatible with the range of Johnson and Evinrude engines of the E6, E8, E25, E40, E55, J6, J8, J25, J40, and J55 series.

When to Replace This Part?

The most common symptoms of a faulty CDI ignition module include intermittent or total spark failure, the engine starting in cold but stalling when warm, rough jerking at certain RPM ranges, or the inability to exceed a specific RPM without engine bogging. Unlike mechanical wear parts, the black box has no fixed replacement interval by hours, but should be inspected for any symptoms of irregular ignition or when other electrical causes such as coils or capacitors have been ruled out. Replacing this module preventively as soon as the first signs appear prevents being stranded offshore and costly emergency repairs.

Compatible Johnson/Evinrude Engines

Equivalent Manufacturer References