{"product_id":"mercury-mercruiser-cap-and-rotor-kit-fits-gm-v-6-engines-with-thunderbolt-iv-v-hei-ignitions-815407q5","title":"Mercury – Quicksilver 815407Q5 Distributor Cap Kit | V6 GM MerCruiser Engines | Thunderbolt IV \u0026 V HEI Ignition | 815407Q5","description":"\u003cp data-start=\"0\" data-end=\"128\"\u003e\u003cstrong data-start=\"0\" data-end=\"126\"\u003eMercury – Quicksilver 815407Q5 Distributor Cap Kit | V6 GM MerCruiser Engines | Thunderbolt IV \u0026amp; V HEI Ignition | 815407Q5\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"130\" data-end=\"133\"\u003e\n\u003ch3 data-start=\"135\" data-end=\"153\"\u003e\u003cstrong data-start=\"139\" data-end=\"151\"\u003eOverview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"154\" data-end=\"539\"\u003eA strong, even spark is what brings your MerCruiser engine to life — and keeps it running smooth all day long. The \u003cstrong data-start=\"269\" data-end=\"313\"\u003eQuicksilver 815407Q5 Distributor Cap Kit\u003c\/strong\u003e makes sure that spark stays clean, steady, and reliable. Designed for \u003cstrong data-start=\"384\" data-end=\"418\"\u003eV6 GM-based MerCruiser engines\u003c\/strong\u003e with \u003cstrong data-start=\"424\" data-end=\"468\"\u003eThunderbolt IV or V HEI ignition systems\u003c\/strong\u003e, this OEM kit includes both the cap and rotor built to factory spec.\u003c\/p\u003e\n\u003cp data-start=\"541\" data-end=\"818\"\u003eIt’s made for the real world of boating — heat, vibration, and constant exposure to moisture. When you swap in a new cap and rotor, you’ll notice easier starts, a smoother idle, and that solid, confident throttle response that tells you your ignition is dialed in just right.\u003c\/p\u003e\n\u003chr data-start=\"820\" data-end=\"823\"\u003e\n\u003ch3 data-start=\"825\" data-end=\"847\"\u003e\u003cstrong data-start=\"829\" data-end=\"845\"\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"850\" data-end=\"950\"\u003e\n\u003cstrong data-start=\"850\" data-end=\"862\"\u003ePurpose:\u003c\/strong\u003e Restores crisp spark timing and consistent ignition performance in V6 marine engines.\u003c\/li\u003e\n\u003cli data-start=\"953\" data-end=\"1058\"\u003e\n\u003cstrong data-start=\"953\" data-end=\"965\"\u003eFitment:\u003c\/strong\u003e For \u003cstrong data-start=\"970\" data-end=\"1004\"\u003eGM-based MerCruiser V6 engines\u003c\/strong\u003e using \u003cstrong data-start=\"1011\" data-end=\"1055\"\u003eThunderbolt IV or V HEI ignition systems\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli data-start=\"1061\" data-end=\"1155\"\u003e\n\u003cstrong data-start=\"1061\" data-end=\"1075\"\u003eMaterials:\u003c\/strong\u003e Cap molded from a \u003cstrong data-start=\"1094\" data-end=\"1115\"\u003ePBT\/PET composite\u003c\/strong\u003e that resists warping and heat damage.\u003c\/li\u003e\n\u003cli data-start=\"1158\" data-end=\"1269\"\u003e\n\u003cstrong data-start=\"1158\" data-end=\"1180\"\u003eElectrical Design:\u003c\/strong\u003e \u003cstrong data-start=\"1181\" data-end=\"1206\"\u003eSolid brass terminals\u003c\/strong\u003e resist corrosion and pitting for a clean, stable spark path.\u003c\/li\u003e\n\u003cli data-start=\"1272\" data-end=\"1380\"\u003e\n\u003cstrong data-start=\"1272\" data-end=\"1287\"\u003eDurability:\u003c\/strong\u003e \u003cstrong data-start=\"1288\" data-end=\"1327\"\u003eHigh strength-to-weight ratio rotor\u003c\/strong\u003e resists cracking and holds timing under vibration.\u003c\/li\u003e\n\u003cli data-start=\"1383\" data-end=\"1496\"\u003e\n\u003cstrong data-start=\"1383\" data-end=\"1402\"\u003eRFI Protection:\u003c\/strong\u003e Built to reduce \u003cstrong data-start=\"1419\" data-end=\"1451\"\u003eradio frequency interference\u003c\/strong\u003e, keeping your electronics quiet and clear.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1498\" data-end=\"1501\"\u003e\n\u003ch3 data-start=\"1503\" data-end=\"1540\"\u003e\u003cstrong data-start=\"1507\" data-end=\"1538\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"1543\" data-end=\"1592\"\u003eV6 GM MerCruiser sterndrive and inboard engines\u003c\/li\u003e\n\u003cli data-start=\"1595\" data-end=\"1638\"\u003eThunderbolt IV and V HEI ignition systems\u003c\/li\u003e\n\u003cli data-start=\"1641\" data-end=\"1704\"\u003eCommon on bowriders, cruisers, and mid-size performance boats\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1706\" data-end=\"1709\"\u003e\n\u003ch3 data-start=\"1711\" data-end=\"1753\"\u003e\u003cstrong data-start=\"1715\" data-end=\"1751\"\u003ePerformance \u0026amp; Practical Benefits\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1754\" data-end=\"2118\"\u003eWhen the ignition cap and rotor start to wear, the engine’s spark weakens — leading to hesitation, hard starts, and rough idle. The \u003cstrong data-start=\"1886\" data-end=\"1902\"\u003e815407Q5 kit\u003c\/strong\u003e solves that by restoring tight, corrosion-free contact points and proper spark spacing. The brass inserts deliver an even spark to every cylinder, while the composite housing stays stable under heat and vibration.\u003c\/p\u003e\n\u003cp data-start=\"2120\" data-end=\"2411\"\u003eYou’ll notice smoother acceleration, quicker starting, and cleaner running right away. The RFI-resistant design also helps keep your electronics — from depth finders to radios — free from interference. It’s a simple part that brings your engine’s performance right back where it should be.\u003c\/p\u003e\n\u003chr data-start=\"2413\" data-end=\"2416\"\u003e\n\u003ch3 data-start=\"2418\" data-end=\"2439\"\u003e\u003cstrong data-start=\"2422\" data-end=\"2437\"\u003eWhy Buy OEM\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2440\" data-end=\"2676\"\u003eMercury’s OEM ignition parts are designed from the ground up for marine duty. They’re not repurposed automotive components — every detail, from the brass terminals to the resin mix, is chosen for long life in salt, heat, and humidity.\u003c\/p\u003e\n\u003cp data-start=\"2678\" data-end=\"2966\"\u003eAftermarket caps and rotors often look similar but tend to use softer metals or cheaper plastics that warp, crack, or corrode faster. With \u003cstrong data-start=\"2817\" data-end=\"2846\"\u003egenuine Quicksilver parts\u003c\/strong\u003e, you get the exact fit, performance, and dependability your engine was built around — no surprises, just reliability.\u003c\/p\u003e\n\u003chr data-start=\"2968\" data-end=\"2971\"\u003e\n\u003ch3 data-start=\"2973\" data-end=\"2986\"\u003e\u003cstrong data-start=\"2977\" data-end=\"2984\"\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2987\" data-end=\"3147\"\u003e\u003cstrong data-start=\"2987\" data-end=\"3037\"\u003eQ1: What engines fit the Quicksilver 815407Q5?\u003c\/strong\u003e\u003cbr data-start=\"3037\" data-end=\"3040\"\u003eA: It’s made for \u003cstrong data-start=\"3057\" data-end=\"3091\"\u003eV6 GM-based MerCruiser engines\u003c\/strong\u003e running \u003cstrong data-start=\"3100\" data-end=\"3144\"\u003eThunderbolt IV or V HEI ignition systems\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"3149\" data-end=\"3255\"\u003e\u003cstrong data-start=\"3149\" data-end=\"3201\"\u003eQ2: Does the kit include both the cap and rotor?\u003c\/strong\u003e\u003cbr data-start=\"3201\" data-end=\"3204\"\u003eA: Yes, the \u003cstrong data-start=\"3216\" data-end=\"3228\"\u003e815407Q5\u003c\/strong\u003e kit includes both parts.\u003c\/p\u003e\n\u003cp data-start=\"3257\" data-end=\"3398\"\u003e\u003cstrong data-start=\"3257\" data-end=\"3298\"\u003eQ3: Is it suitable for saltwater use?\u003c\/strong\u003e\u003cbr data-start=\"3298\" data-end=\"3301\"\u003eA: Yes. The brass contacts and reinforced housing resist corrosion in both salt and freshwater.\u003c\/p\u003e\n\u003cp data-start=\"3400\" data-end=\"3548\"\u003e\u003cstrong data-start=\"3400\" data-end=\"3453\"\u003eQ4: How often should I replace the cap and rotor?\u003c\/strong\u003e\u003cbr data-start=\"3453\" data-end=\"3456\"\u003eA: Check annually or every 100 hours — replace if there’s corrosion, cracks, or misfiring.\u003c\/p\u003e\n\u003cp data-start=\"3550\" data-end=\"3712\"\u003e\u003cstrong data-start=\"3550\" data-end=\"3582\"\u003eQ5: Can I replace it myself?\u003c\/strong\u003e\u003cbr data-start=\"3582\" data-end=\"3585\"\u003eA: Definitely. It’s a straightforward job — just mark your wires, swap the parts, and torque to spec per your service manual.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46936159617315,"sku":"815407Q5","price":41.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/815407q5_main.jpg?v=1760631221","url":"https:\/\/partsvu.com\/en-mx\/products\/mercury-mercruiser-cap-and-rotor-kit-fits-gm-v-6-engines-with-thunderbolt-iv-v-hei-ignitions-815407q5","provider":"PartsVu","version":"1.0","type":"link"}