Mercury Quicksilver OEM 339-898103T This is a genuine Mercury Marine Quicksilver factory OEM part, not aftermarket Description & Function This part is labelled as an ignition coil (also referred to as "Coil, Ignition") for certain Mercury/Mercruiser outboard engines. The part is used for 4‑stroke EFI (electronic fuel injection) three‑cylinder outboards in the 25 HP and 30 HP class (and some other small‑engine applications) according to one listing: "25 HP EFI (3 Cyl.) ... 30 HP EFI (3 Cyl.) Compatible Engines & Serial Number Ranges 25 EFI (3 CYL.)(4-STROKE) - 0R106999 & Up 25 Jet EFI (3 CYL.)(4-STROKE) - 0R165086 & Up 30 EFI (3 CYL.)(4-STROKE) - 0R106999 & Up
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