Ignition Coil 502888 0502888

Function and technical context

The ignition coil is the component responsible for transforming the battery voltage into the high voltage necessary to generate the spark at the spark plugs, being the heart of the ignition system in outboard motors. It operates within the electronic ignition circuit, working in coordination with the power module and the stator to ensure precise combustion in each engine cycle. A failure in this coil causes weak or no spark, resulting in poor starting, misfiring under load and severe power loss, potentially leaving the vessel inoperative in the water. This unit with reference 0502888 is compatible with engines from OMC and Mercury/Mariner brands, covering a wide range of marine propulsion equipment.

When to replace this part?

The most common symptoms of a deteriorated ignition coil include jerking or hesitation at medium-high rpm, difficulty starting in cold conditions, cylinders misfiring intermittently and engine shutting down suddenly then restarting after cooling. It is recommended to check the condition of the coils at each seasonal maintenance or every 100-150 hours of navigation, especially on engines operating in high humidity and saltwater environments, conditions that accelerate internal insulation deterioration. Replacing the coil preventively at the first signs of symptoms avoids being stranded and facing emergency repairs at much higher cost.

Equivalent manufacturer references