{"product_id":"sierra-18-5280-marine-tune-up-kit-distributor-cap-and-rotor-for-crusader-v-8-prestolite-electronic-ignition-oe-392-9766-392-9089","title":"Sierra 18-5280 In-Line 4 Delco EST Ignition Tune-Up Kit, Replaces Mercruiser 811635Q1","description":"\u003cp\u003eThe Sierra 18-5280 Tune Up Kit is an ignition tune-up kit designed for in-line 4 Delco EST applications. It is built to work with the Sierra 18-5475 Delco HEI distributor used on GM 4 cylinder engines, making it a straightforward way to freshen up the ignition system on a compatible in-line 4 Delco EST setup. The kit bundles the two components most commonly worn out in an ignition tune-up: a distributor cap and a rotor, so both parts are replaced together for even wear and reliable spark delivery going forward.\u003c\/p\u003e\u003cp\u003eInside the kit you will find a Sierra 18-5361 distributor cap and a Sierra 18-5406 rotor, both manufactured to meet or exceed the performance of the original equipment parts they replace. The distributor cap and rotor are finished with a machined exterior for a precise fit against the distributor housing and points\/contacts. This kit is intended as a direct interchange for a number of OEM and aftermarket part numbers, so it can be used as a like-for-like replacement without modification on applications that call for those numbers.\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 18-5280\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Ignition Tune-Up Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Application:\u003c\/strong\u003e In-Line 4 Delco EST\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Distributor:\u003c\/strong\u003e Sierra 18-5475 Delco HEI Distributor (GM 4 Cylinder)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Includes:\u003c\/strong\u003e Sierra 18-5361 Distributor Cap, Sierra 18-5406 Rotor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.47 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 5.6 x 4.9 x 3.7 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282105099\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned for in-line 4 Delco EST ignition applications, including use with the Sierra 18-5475 Delco HEI distributor (GM 4 cylinder).\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eCDI E66-0003\u003c\/li\u003e\n\u003cli\u003eGLM 71830\u003c\/li\u003e\n\u003cli\u003eMallory 9-29320\u003c\/li\u003e\n\u003cli\u003eMercruiser 811635Q1\u003c\/li\u003e\n\u003cli\u003eMercruiser 811635Q2\u003c\/li\u003e\n\u003cli\u003eMercruiser 811635T2\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-5280 Tune Up Kit include?\u003c\/strong\u003e The Sierra 18-5280 kit includes one Sierra 18-5361 distributor cap and one Sierra 18-5406 rotor, giving you both ignition components needed for a tune-up in a single kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat engines is the 18-5280 tune-up kit designed for?\u003c\/strong\u003e It is designed for in-line 4 Delco EST ignition applications, and it can be used with the Sierra 18-5475 Delco HEI distributor on GM 4 cylinder engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-5280 a genuine Sierra part or aftermarket?\u003c\/strong\u003e 18-5280 is a genuine Sierra part number, and the distributor cap and rotor it contains (18-5361 and 18-5406) are also Sierra components, built to meet or exceed the original equipment parts they replace.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM and aftermarket numbers does the 18-5280 kit cross-reference to?\u003c\/strong\u003e The Sierra 18-5280 is interchangeable with CDI E66-0003, GLM 71830, Mallory 9-29320, and Mercruiser 811635Q1, 811635Q2, and 811635T2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-5280 tune-up kit weigh?\u003c\/strong\u003e The kit weighs 0.47 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the Sierra 18-5280 kit as packaged?\u003c\/strong\u003e The product measures 5.6 x 4.9 x 3.7 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this kit be used with a Mercruiser stern drive calling for part 811635Q2?\u003c\/strong\u003e Yes, the Sierra 18-5280 kit is a direct interchange for Mercruiser stern drive part numbers 811635Q1, 811635Q2, and 811635T2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-5280 kit work with the Sierra 18-5475 distributor?\u003c\/strong\u003e Yes, the 18-5280 tune-up kit is designed to be used with the Sierra 18-5475 Delco HEI distributor for GM 4 cylinder applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat finish is used on the distributor cap and rotor in this kit?\u003c\/strong\u003e The components in the Sierra 18-5280 kit have a machined exterior finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy replace the distributor cap and rotor together instead of separately?\u003c\/strong\u003e The Sierra 18-5280 bundles the 18-5361 distributor cap and 18-5406 rotor so both wear-prone ignition parts are refreshed together, helping maintain even ignition performance rather than replacing just one worn component.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-5280 a fit-specific kit or a universal kit?\u003c\/strong\u003e It is fit specific to in-line 4 Delco EST ignition applications, so the part numbers should be checked against the application before ordering.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988205711579,"sku":"SIE-18-5280","price":19.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-5280__64638.1722367723.500.750.jpg?v=1785188916","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-5280-marine-tune-up-kit-distributor-cap-and-rotor-for-crusader-v-8-prestolite-electronic-ignition-oe-392-9766-392-9089","provider":"Good Vibes Marina","version":"1.0","type":"link"}