{"product_id":"sierra-18-5406-distributor-rotor-for-gm-4-cylinder-delco-est-ignition-replaces-omc-986651-mercruiser-811636","title":"Sierra 18-5406 Delco Distributor Rotor, Replaces OMC 986651, for GM 4 Cylinder Marine Engines with Delco EST Ignition","description":"\u003cp\u003eThe Sierra 18-5406 is a Delco-style distributor rotor built as a direct replacement for marine ignition systems using a Delco EST distributor. It mounts inside the distributor cap and rotates with the distributor shaft to direct high-voltage current from the coil to each spark plug lead in firing order, making it a core wear item in any tune-up or ignition service. The rotor is designed to fit GM 4 cylinder engines equipped with Delco EST ignition, a common configuration on inboard marine powerplants. Its contact surface has a machined finish for reliable, consistent electrical contact with the distributor cap terminals. Sierra engineers this rotor to meet or exceed the performance of the original equipment part it replaces, and it cross-references directly to OMC, GLM, Mallory, Mercruiser, and Volvo Penta part numbers, so it is a straightforward swap whether you are doing a routine ignition tune-up or replacing a worn or cracked rotor. As with all Sierra parts, it is intended to restore factory ignition performance and is backed by Sierra's standard product warranty.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-5406\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Distributor Rotor (Delco style)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e GM 4 Cylinder marine engines with Delco EST ignition\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExterior Finish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e Rotor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.03 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999563736\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eThis rotor fits GM 4 Cylinder marine engines equipped with Delco EST ignition.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOMC 986651\u003c\/li\u003e\n\u003cli\u003eGLM 71120\u003c\/li\u003e\n\u003cli\u003eMallory 9-29220\u003c\/li\u003e\n\u003cli\u003eMercruiser 811636\u003c\/li\u003e\n\u003cli\u003eMercruiser 898253011\u003c\/li\u003e\n\u003cli\u003eMercruiser 811636-1\u003c\/li\u003e\n\u003cli\u003eMercruiser 8M001254\u003c\/li\u003e\n\u003cli\u003eMercruiser 802468\u003c\/li\u003e\n\u003cli\u003eVolvo Penta 3854261\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-5406 rotor fit?\u003c\/strong\u003e The Sierra 18-5406 is designed for GM 4 Cylinder marine engines equipped with Delco EST ignition.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-5406 a genuine OEM part or aftermarket?\u003c\/strong\u003e It is a Sierra aftermarket replacement rotor, engineered to meet or exceed the performance of the original equipment rotor it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-5406 rotor cross-reference to?\u003c\/strong\u003e The Sierra 18-5406 replaces OMC 986651, GLM 71120, Mallory 9-29220, Mercruiser 811636, 898253011, 811636-1, and 8M001254, Mercruiser 802468, and Volvo Penta 3854261.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-5406 distributor rotor weigh?\u003c\/strong\u003e The Sierra 18-5406 rotor weighs 0.03 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat finish does the rotor's contact surface have?\u003c\/strong\u003e The Sierra 18-5406 rotor has a machined finish on its contact surface for consistent electrical contact inside the distributor cap.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order part number 18-5406?\u003c\/strong\u003e The order includes one Sierra 18-5406 rotor; a matching Sierra distributor cap is sold separately.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this rotor work with a Delco EST distributor cap from another brand?\u003c\/strong\u003e Yes, the Sierra 18-5406 is a Delco-style rotor that cross-references to OMC, GLM, Mallory, Mercruiser, and Volvo Penta equivalents, so it fits distributor caps built for those same Delco EST applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should the distributor rotor be replaced?\u003c\/strong\u003e A distributor rotor like the Sierra 18-5406 should be replaced during a routine ignition tune-up or whenever the contact tip shows wear, pitting, or cracking that can cause misfires.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes Sierra offer a warranty on the 18-5406 rotor?\u003c\/strong\u003e Yes, the Sierra 18-5406 rotor is covered under Sierra's standard product warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs installation of the 18-5406 rotor straightforward?\u003c\/strong\u003e The Sierra 18-5406 is a direct-fit replacement rotor that installs onto the distributor shaft in place of the original Delco-style rotor, using the same mounting configuration as the OEM part.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988213575899,"sku":"SIE-18-5406","price":6.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-5406_lg__45826.1558128354.500.750.jpg?v=1785189068","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-5406-distributor-rotor-for-gm-4-cylinder-delco-est-ignition-replaces-omc-986651-mercruiser-811636","provider":"Good Vibes Marina","version":"1.0","type":"link"}