Ignition Coil 502880 0502880

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 an essential element within the outboard engine ignition system. It works in close coordination with the power module and the stator, generating the electrical impulses that determine the exact moment of combustion in each cylinder. A faulty coil causes intermittent or complete ignition failures, resulting in power loss, rough engine operation or inability to start. This unit, identified under the reference 0502880 / 502880, is compatible with Johnson and Evinrude engines in the OMC range, as well as with Mercury/Mariner/MerCruiser units under the equivalent reference 802356.

When to Replace This Part?

The most frequent symptoms of a deteriorated ignition coil include difficult cold starting, jerking or misfire at certain engine speeds, sudden engine stalling under load and complete absence of spark in one or several cylinders when checking with a timing gun. There is no fixed replacement interval for this component, although it is recommended to inspect it at each annual seasonal service, especially on engines with more than ten years of use or that have suffered prolonged exposure to moisture and salt. Replacing the coil preventively at the first symptoms avoids serious breakdowns and immobilization offshore, where the consequences of an ignition failure can be much more costly.

Compatible Johnson/Evinrude Engines

Equivalent Manufacturer References