{"product_id":"tutor-auto-ignition-sensor-kit-87-91019a3-mercruiser-thunderbolt-direct-fit-pickup-4-3l-8-2l-restores-spark","title":"Tutor Auto Ignition Sensor Kit 87-91019A3 — MerCruiser Thunderbolt direct-fit pickup 4.3L–8.2L, restores spark","description":"\u003cb\u003eTutor Auto 87-91019A3 Ignition Sensor Kit is a direct-fit replacement pickup assembly for MerCruiser Thunderbolt distributors used on 4.3L–8.2L V6 and V8 marine engines.\u003c\/b\u003e\n\n\u003cp\u003eThis replacement ignition sensor assembly restores the distributor’s electronic trigger so your MerCruiser ignition system can produce consistent spark. It is made as a factory-fit aftermarket unit to replace faded or faulty pickups that cause rough starts, stalling, or intermittent ignition problems. The kit is compatible with a wide range of Thunderbolt distributor variants and cross-references multiple OEM part numbers for easy identification.\u003c\/p\u003e\n\n\u003ch3\u003eHow will this ignition sensor kit resolve starting or stalling issues?\u003c\/h3\u003e\n\u003cp\u003eA worn or failed pickup inside the distributor won’t send a clean signal to the ignition module, which can lead to weak spark, misfires, or no-start conditions. Replacing the pickup restores the timing signal and brings the ignition system back to proper operation without replacing the entire distributor.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReplaces internal ignition pickup that triggers coil firing.\u003c\/li\u003e\n  \u003cli\u003eRestores consistent electrical pulses for reliable spark.\u003c\/li\u003e\n  \u003cli\u003eDirect-fit to Thunderbolt-type distributors—no machining required.\u003c\/li\u003e\n  \u003cli\u003eTested before shipping to ensure correct signal output.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich MerCruiser engines and distributor families is this compatible with?\u003c\/h3\u003e\n\u003cp\u003eThis Tutor Auto pickup kit fits Thunderbolt I through IV, Gen VI and related MR, MAG, ALPHA, and BRAVO distributor families used across MerCruiser V6 and V8 engines from the 1980s and 1990s. It covers common displacements and model numbers so you can match by engine size or cross-reference part numbers.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible engine sizes: 4.3L, 5.0L, 5.7L, 7.4L, 8.2L.\u003c\/li\u003e\n  \u003cli\u003eWorks with V6 and V8 models including 205–600 CID ranges listed by MerCruiser.\u003c\/li\u003e\n  \u003cli\u003eFits Thunderbolt I–IV, Gen VI, MR, MAG, ALPHA, BRAVO distributors (1981–1997).\u003c\/li\u003e\n  \u003cli\u003eCross-replaces part numbers: 87-91019A2\/A3\/A6, 87-892150Q02, 87-861780Q4, Sierra 18-5116, Mallory 9-29804.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I expect during installation and maintenance?\u003c\/h3\u003e\n\u003cp\u003eInstallation is a straightforward swap of the pickup inside the distributor; you do not need to replace the entire distributor assembly. Basic mechanical skill and a few tools are sufficient—follow distributor timing marks and torque specs when reassembling to preserve engine timing accuracy.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInside-distributor replacement—no modifications required.\u003c\/li\u003e\n  \u003cli\u003eObserve distributor index and timing when reinstalling rotor and cap.\u003c\/li\u003e\n  \u003cli\u003eInspect wiring and coil connections while you have the distributor open.\u003c\/li\u003e\n  \u003cli\u003eTest engine start and idle stability after installation to confirm fix.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Tutor Auto 87-91019A3 pickup kit is aimed at boat owners, marine mechanics, and DIY restorers working on older MerCruiser-powered vessels who need a reliable, cost-effective replacement for a failing ignition pickup. If your engine shows intermittent ignition, stalls, or won’t start and you have a Thunderbolt-type distributor from the 1981–1997 era, this direct replacement offers an exact-fit aftermarket solution with cross-referenced part numbers and a 12-month warranty for added confidence.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this pickup fit my MerCruiser 5.7L Thunderbolt distributor?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the 87-91019A3 kit fits 5.7L MerCruiser engines using Thunderbolt-type distributors from the covered model years.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the kit replace the entire distributor?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No — it replaces the internal ignition pickup only, restoring the distributor's trigger signal without swapping the whole assembly.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Tutor Auto","offers":[{"title":"Default Title","offer_id":67589496307897,"sku":"B07X1VHSB8","price":73.71,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/tutor-auto-ignition-pickup-front-view.jpg?v=1790530522","url":"https:\/\/redleafauto.ca\/products\/tutor-auto-ignition-sensor-kit-87-91019a3-mercruiser-thunderbolt-direct-fit-pickup-4-3l-8-2l-restores-spark","provider":"Redleaf Auto","version":"1.0","type":"link"}