Delco EST 4 Cylinder Rotor | Sierra 18-5406 Rotor for 4 cylinder marine engines with Delco EST HEI module-in-cap distributors. Use with 18-5361 distributor cap Replaces Mercury 811636, 811636 1, and 898253011 Replaces OMC 3854261 Replaces Volvo Penta 3854261