Industrial 811639T Distributor Pickup Coil Kit

This aftermarket 811639T distributor pickup coil kit is a direct replacement for MerCruiser/Quicksilver distributors that use the Delco EST ignition system. It substitutes the OEM MerCruiser 811639T pickup in 4‑cylinder, V6, and V8 Delco EST configurations, including the GM 3.0L (GM 181 I/L4) family used in MerCruiser inboard installations. Cross references commonly listed with this part include 3854001, 18-5108, and 72130, as found in marine catalogs and OEM cross-reference listings. As a Delco EST pickup coil sensor, it supplies the ignition trigger signal to the distributor module, enabling proper timing and ignition without replacing the entire distributor in MerCruiser inboard/sterndrive engines.