Ignition Coil 502890 0502890

Function and technical context

The ignition coil is the component responsible for transforming battery voltage into the high voltage necessary to generate spark at the spark plugs, being the heart of the ignition system in outboard and stationary engines. In Johnson and OMC engines, this component works in close coordination with the ignition module and stator, generating high-energy electrical impulses that ensure complete combustion in each engine cycle. A failure in the coil causes irregular ignition, severe power loss or complete inability to start the engine, which may leave the vessel without propulsion while underway. Reference 502890 / 0502890 is an ignition coil compatible with the electrical systems of the indicated brands, ensuring precise and reliable ignition response.

When to replace this part?

The most common symptoms of a deteriorated ignition coil include intermittent ignition failures (especially when cold or after reaching operating temperature), jerking or sudden engine cuts at certain RPMs, and repeated starting difficulty with no apparent cause in the fuel system. It is recommended to check the ignition coil at each seasonal maintenance, especially if the engine has accumulated more than 300 hours of use or if it has been in service for several years without replacement of the ignition system. Replacing the coil preventively at the first signs of symptoms prevents breakdowns at sea and costly emergency assistance.

Equivalent manufacturer references