{"product_id":"distributor-cap-for-mercruiser-thunderbolt-iv-v-hei-v-8-replaces-805759t3-16457a4-sierra-18-5395-includes-gasket","title":"Sierra Distributor Cap 18-5395 with Gasket, Replaces Mercury Marine 805759T1, for GM V-8 Thunderbolt IV \u0026 V HEI Ignitions","description":"\u003cp\u003eThe Sierra 18-5395 Distributor Cap is a direct-fit ignition component for GM V-8 marine engines equipped with Thunderbolt IV and Thunderbolt V HEI ignition systems. It ships complete with the gasket needed for installation, so there is no need to source a separate seal. The cap is built with a moisture-proof, molded insulator body and a high-quality conductive center carrier that maintains consistent conductor integrity for reliable spark delivery.\u003c\/p\u003e\u003cp\u003eThis is part of Sierra's MAGFORCE-compatible ignition lineup, engineered to be \"electronics friendly\" so it protects onboard electronic devices and electronic engine controls from RFI and EMI interference while still delivering maximum voltage to the ignition system. The cap features a black machined metal housing with a twist-on closure for a secure, exact-fit installation that seats correctly against the distributor body every time.\u003c\/p\u003e\u003cp\u003eThe 18-5395 is used across several MerCruiser stern-drive applications with 540 and 572 cubic inch V-8 engines, including the 500 Bulldog, 575, and 800 SC models. Every Sierra part is built to meet or exceed the performance of the original equipment part it replaces, and it is backed by Sierra's standard limited 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 18-5395\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Distributor Cap\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e Distributor Cap, Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExterior Finish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClosure Type:\u003c\/strong\u003e Twist-On\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.82 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e GM V-8 Engines With Thunderbolt IV \u0026amp; V HEI Ignitions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e Mercury Marine 805759T1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999319135\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMerCruiser 500 Bulldog, 540 cid V-8, 1990-2001\u003c\/li\u003e\n\u003cli\u003eMerCruiser 575, 540 cid V-8, 1986-1992\u003c\/li\u003e\n\u003cli\u003eMerCruiser 800 SC, 572 cid V-8, 1993-1998\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury Marine 805759T1\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-5395 distributor cap fit?\u003c\/strong\u003e The 18-5395 is designed for GM V-8 engines equipped with Thunderbolt IV and Thunderbolt V HEI ignition systems, and it is used on MerCruiser 500 Bulldog, 575, and 800 SC applications with 540 and 572 cubic inch V-8 engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-5395 distributor cap include the gasket?\u003c\/strong\u003e Yes, the Sierra 18-5395 comes with the gasket included, so no separate gasket purchase is needed for installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the OEM equivalent for part number 18-5395?\u003c\/strong\u003e Sierra 18-5395 cross-references to Mercury Marine part number 805759T1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-5395 distributor cap made from?\u003c\/strong\u003e It is made from black machined metal with a moisture-proof, molded insulator construction and a conductive center carrier for consistent conductor integrity.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does the cap attach to the distributor?\u003c\/strong\u003e The 18-5395 uses a twist-on closure design for a secure, exact-fit installation on GM V-8 distributors with Thunderbolt IV\/V HEI ignitions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-5395 distributor cap?\u003c\/strong\u003e The cap measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-5395 weigh?\u003c\/strong\u003e The distributor cap weighs 0.82 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-5395 an OEM or aftermarket part?\u003c\/strong\u003e It is an aftermarket Sierra replacement part engineered to meet or exceed the performance of the original equipment distributor cap it replaces, including the Mercury Marine 805759T1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-5395 protect onboard electronics from interference?\u003c\/strong\u003e Yes, this cap is built to be electronics friendly, shielding electronic devices and electronic engine controls from RFI and EMI while still delivering maximum voltage.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat MerCruiser models use the 18-5395 distributor cap?\u003c\/strong\u003e It is used on the MerCruiser 500 Bulldog (1990-2001), 575 (1986-1992), and 800 SC (1993-1998), all 540 or 572 cubic inch V-8 configurations.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs a warranty included with the 18-5395 distributor cap?\u003c\/strong\u003e Yes, the Sierra 18-5395 is covered under Sierra's standard limited warranty.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988213215451,"sku":"SIE-18-5395","price":42.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-5395_lg__69545.1558127815.500.750.jpg?v=1785188581","url":"https:\/\/www.goodvibesmarina.com\/products\/distributor-cap-for-mercruiser-thunderbolt-iv-v-hei-v-8-replaces-805759t3-16457a4-sierra-18-5395-includes-gasket","provider":"Good Vibes Marina","version":"1.0","type":"link"}