{"product_id":"sierra-18-5108-marine-pickup-coil-sensor-for-gm-delco-hei-ignition-4-cyl-v-6-v-8","title":"Sierra 18-5108 Pick-Up Coil Sensor, Replaces 811639, Fits V4\/V6\/V8 Delco EST Ignition","description":"\u003cp\u003eThe Sierra 18-5108 is a pick-up coil sensor engineered for marine engines running a Delco EST ignition system. It is designed to fit V4, V6, and V8 engine configurations, generating the timing signal the ignition module relies on to fire the spark at the correct moment. As the pick-up coil ages or its magnetic winding degrades, engines can misfire, stall, or fail to start; replacing it with the 18-5108 restores a clean, accurate timing signal.\u003c\/p\u003e\u003cp\u003eBuilt with a metal and plastic housing, the 18-5108 uses a flange mount for a secure, repeatable installation and produces a digital output signal. It carries an upper temperature rating of 400 degrees Fahrenheit, reflecting the heat exposure typical of an engine bay. Sierra engineers this sensor to meet or exceed the specification of the original equipment part it replaces, and Sierra supplies OEM engine manufacturers and boat builders with parts daily, so the 18-5108 is built to the same fit, form, and function as the factory sensor.\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 18-5108\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Pick-Up Coil Sensor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e V4\/V6\/V8 engines with Delco EST ignition\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces:\u003c\/strong\u003e 811639\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Metal, Plastic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Type:\u003c\/strong\u003e Flange Mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Type:\u003c\/strong\u003e Digital\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpper Temperature Rating:\u003c\/strong\u003e 400 Degrees Fahrenheit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.09 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999563675\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eV4\/V6\/V8 engines with Delco EST ignition\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e811639\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-5108 pick-up coil sensor fit?\u003c\/strong\u003e It fits V4, V6, and V8 engines equipped with a Delco EST ignition system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-5108 replace OEM part number 811639?\u003c\/strong\u003e Yes, the Sierra 18-5108 pick-up coil sensor replaces OEM part number 811639.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the pick-up coil sensor made of?\u003c\/strong\u003e The 18-5108 is constructed of metal and plastic for durability in the engine environment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat temperature can the 18-5108 sensor withstand?\u003c\/strong\u003e It carries an upper temperature rating of 400 degrees Fahrenheit, suited to the heat inside a marine engine compartment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is the 18-5108 sensor mounted?\u003c\/strong\u003e The Sierra 18-5108 uses a flange mount for installation onto the distributor or ignition housing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat type of signal output does this sensor produce?\u003c\/strong\u003e The 18-5108 pick-up coil sensor produces a digital output signal to the ignition module.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the physical dimensions of the 18-5108?\u003c\/strong\u003e The sensor measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-5108 weigh?\u003c\/strong\u003e It weighs 0.09 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-5108 an OEM-quality replacement?\u003c\/strong\u003e Sierra engineers the 18-5108 to meet or exceed the original equipment part it replaces, and Sierra supplies OEM engine manufacturers and boat builders with parts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-5108 work with a Delco HEI ignition setup?\u003c\/strong\u003e The 18-5108 is built for Delco EST ignition on V4\/V6\/V8 engines; confirm your ignition type matches before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat symptoms indicate a failing pick-up coil sensor like the 18-5108?\u003c\/strong\u003e A worn pick-up coil sensor commonly causes misfiring, stalling, or a no-start condition because the ignition module no longer receives an accurate timing signal.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988199616731,"sku":"SIE-18-5108","price":30.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-5108_lg__04973.1558127447.500.750.jpg?v=1785188679","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-5108-marine-pickup-coil-sensor-for-gm-delco-hei-ignition-4-cyl-v-6-v-8","provider":"Good Vibes Marina","version":"1.0","type":"link"}