{"product_id":"sierra-18-5436-ignition-coil-volvo-penta-outboard","title":"Sierra 18-5436 Ignition Coil, Volvo Penta Outboard","description":"\u003cp class=\"nvn-hero\"\u003eThe Sierra 18-5436 is a canister-style ignition coil that drops right onto Volvo Penta outboard engines. It reads 1.6 ohms on the primary and 8.6K on the secondary, runs on a 14 volt input, and meets or exceeds the coil it replaces. If your motor's got weak spark or won't fire, this is the part that gets it running again.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eThe Sierra 18-5436 is a canister-style ignition coil built to replace the original coil on Volvo Penta outboard engines. If your motor's been cranking but won't fire, or it starts rough after sitting through the off-season, a tired coil is one of the first things worth checking. This one's a direct-fit replacement that meets or exceeds the original equipment part, so you're not guessing at whether it'll work with your ignition.\u003c\/p\u003e\n\u003cp\u003eHere's what's going on under the cap. The primary winding measures 1.6 ohms and the secondary sits at 8.6K ohms. Those two numbers are your diagnostic baseline. Put a multimeter across the primary terminals and you should read right around 1.6 ohms. Check the secondary and you're looking for roughly 8.6K ohms. Drift too far off either figure and the coil's on its way out, which usually shows up as weak spark, a hard start, or no start at all. The coil runs on a 14 volt input, matched to a healthy marine charging system.\u003c\/p\u003e\n\u003cp\u003eNot sure if the coil is really your problem? Start with the basics. Check for spark at the plug, confirm the plug wires and connectors are clean and tight, and rule out a weak battery or a bad kill switch first. When those all check out and the resistance readings are off, the coil is your answer. Testing takes five minutes with a meter and saves you from throwing parts at a no-start.\u003c\/p\u003e\n\u003cp\u003eIt's designed for Volvo Penta outboard applications, and it covers a wide swath of that lineup. Still, do yourself a favor and confirm the exact model and year before you order. Some of the later four-stroke setups use different connectors or a different canister mounting orientation, and you want the new coil to seat cleanly the first time. If you've got your old coil in hand, matching the terminal layout and the mounting bracket is the quickest way to be sure.\u003c\/p\u003e\n\u003cp\u003eInstallation is straightforward for anyone comfortable around an engine. Kill the battery, note where each lead goes, and swap the coil over one wire at a time so nothing gets crossed. On single-outboard runabouts especially, engine vibration is hard on canister coils over the years. Cracks in the housing are common, so if you're mounting in a spot that shakes, a set of rubber isolators buys you some life. Clean the terminals while you're in there and give them a little dielectric grease before you reconnect.\u003c\/p\u003e\n\u003cp\u003eSaltwater is the enemy here. Corroded terminals are one of the most common reasons a good coil starts acting like a bad one, so seasonal cleaning matters. A no-start after winter storage often traces right back to a coil that's failed its secondary resistance test, and this is the part that fixes it. One more thing worth knowing. A 14 volt coil doesn't love voltage spikes. If your alternator or regulator is pushing north of 14.5 volts, sort that out, because a charging system that runs hot will shorten the life of any coil you put on it.\u003c\/p\u003e\n\u003cp\u003ePair it with OEM-style plug wires too. That 8.6K ohm secondary is happiest feeding a clean, factory-spec wire set, and some cheap universal wire kits can arc or bleed voltage at that resistance. It's a small detail that saves you a frustrating misfire chase down the road.\u003c\/p\u003e\n\u003cp\u003eSierra has been supplying marine replacement parts to boaters and OEM builders for decades, and their ignition components are engineered to stand up to the heat, moisture, and pounding that comes with life on the water. This is a single coil, sold on its own, so if your engine runs more than one you'll want to order the count you need. It's a repair part, not a performance upgrade. What it does is get a healthy spark back to your plugs so the motor starts and runs the way it should.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003ePrimary resistance of 1.6 ohms gives you a clear multimeter baseline for testing spark output\u003c\/li\u003e\n  \u003cli\u003eSecondary resistance of 8.6K ohms feeds a strong, consistent spark to the plugs\u003c\/li\u003e\n  \u003cli\u003e14 volt input matched to a healthy marine charging system\u003c\/li\u003e\n  \u003cli\u003eCanister-style housing designed for Volvo Penta outboard mounting\u003c\/li\u003e\n  \u003cli\u003eMeets or exceeds the original equipment coil it replaces\u003c\/li\u003e\n  \u003cli\u003eBlack canister construction built for heat, moisture, and marine vibration\u003c\/li\u003e\n  \u003cli\u003eSold as a single coil for a direct one-to-one replacement\u003c\/li\u003e\n  \u003cli\u003eSierra Marine engineering, trusted by boaters and OEM builders for decades\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"nvn-trust\"\u003e\n  \u003ch2\u003eWhy Buy from NVN Marine\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eAuthorized Sierra Marine reseller, full manufacturer warranty\u003c\/li\u003e\n    \u003cli\u003eNMEA member and ABYC certified, advice from real boat techs\u003c\/li\u003e\n    \u003cli\u003eSame-day shipping before 3 PM ET on in-stock items\u003c\/li\u003e\n    \u003cli\u003eNY headquarters and Fort Lauderdale flagship retail store\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"nvn-faq\"\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat engines does the Sierra 18-5436 fit?\u003c\/summary\u003e\n    \u003cp\u003eIt's built for Volvo Penta outboard engines and covers a wide range of that lineup. Confirm your exact model and year before ordering, since some later four-strokes use different connectors or canister mounting. Matching your old coil's terminal layout is the surest check.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are the resistance specs on this coil?\u003c\/summary\u003e\n    \u003cp\u003eThe primary winding reads 1.6 ohms and the secondary reads 8.6K ohms. Those are your diagnostic targets when you test the coil with a multimeter.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I test the coil with a multimeter?\u003c\/summary\u003e\n    \u003cp\u003ePut your meter across the primary terminals and look for about 1.6 ohms. Then check the secondary for roughly 8.6K ohms. If either reading drifts well off those numbers, the coil's failing and it's time to replace it.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan a bad coil cause a no-start?\u003c\/summary\u003e\n    \u003cp\u003eAbsolutely. A no-start after winter storage often traces back to a coil that's failed its secondary resistance test. Weak spark, hard starting, and intermittent misfires are all classic symptoms of a coil on its way out.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat input voltage does it need?\u003c\/summary\u003e\n    \u003cp\u003eIt's a 14 volt coil, matched to a healthy marine charging system. If your alternator or regulator is pushing much past 14.5 volts, sort that out first, because a hot charging system shortens the life of any coil.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this a direct OEM replacement?\u003c\/summary\u003e\n    \u003cp\u003eYes. Sierra parts are engineered to meet or exceed the original equipment coil, so it's a direct-fit repair, not a modification. Confirm fitment against your engine model to be sure.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes it come as a single coil or a set?\u003c\/summary\u003e\n    \u003cp\u003eIt's sold as a single coil. If your engine runs more than one, order the quantity you need.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I keep it from failing early?\u003c\/summary\u003e\n    \u003cp\u003eClean the terminals and add a little dielectric grease to fight saltwater corrosion, one of the top reasons a good coil starts acting bad. On boats with heavy engine vibration, rubber isolators help keep the canister from cracking over time.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"nvn-specs\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eTitle\u003c\/th\u003e\n\u003ctd\u003eFits Volvo Penta Outboard Engine; Canister; 1.6 Ohms Primary Resistance\/ 8.6K Ohms Secondary Resistance; 14 Volt Input; Black; Single\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eSierra Marine\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003e18-5436\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e030999319357\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003ePart Type\u003c\/th\u003e\n\u003ctd\u003eIgnition Coil\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCoil Style\u003c\/th\u003e\n\u003ctd\u003eCanister\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003ePrimary Resistance\u003c\/th\u003e\n\u003ctd\u003e1.6 Ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSecondary Resistance\u003c\/th\u003e\n\u003ctd\u003e8.6K Ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eInput Voltage\u003c\/th\u003e\n\u003ctd\u003e14 Volt\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003ctd\u003eSingle\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eFits Volvo Penta Outboard Engine\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What engines does the Sierra 18-5436 fit?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's built for Volvo Penta outboard engines and covers a wide range of that lineup. Confirm your exact model and year before ordering, since some later four-strokes use different connectors or canister mounting. Matching your old coil's terminal layout is the surest check.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What are the resistance specs on this coil?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The primary winding reads 1.6 ohms and the secondary reads 8.6K ohms. Those are your diagnostic targets when you test the coil with a multimeter.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How do I test the coil with a multimeter?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Put your meter across the primary terminals and look for about 1.6 ohms. Then check the secondary for roughly 8.6K ohms. If either reading drifts well off those numbers, the coil's failing and it's time to replace it.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Can a bad coil cause a no-start?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Absolutely. A no-start after winter storage often traces back to a coil that's failed its secondary resistance test. Weak spark, hard starting, and intermittent misfires are all classic symptoms of a coil on its way out.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What input voltage does it need?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's a 14 volt coil, matched to a healthy marine charging system. If your alternator or regulator is pushing much past 14.5 volts, sort that out first, because a hot charging system shortens the life of any coil.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is this a direct OEM replacement?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. Sierra parts are engineered to meet or exceed the original equipment coil, so it's a direct-fit repair, not a modification. Confirm fitment against your engine model to be sure.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Does it come as a single coil or a set?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's sold as a single coil. 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On boats with heavy engine vibration, rubber isolators help keep the canister from cracking over time.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Sierra Marine","offers":[{"title":"Default Title","offer_id":45068019957853,"sku":"2009001","price":57.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_aadaf1fd-47be-413a-bf2d-b752c7319d3b.jpg?v=1789677794","url":"https:\/\/nvnmarine.com\/products\/sierra-18-5436-ignition-coil-volvo-penta-outboard","provider":"NVN Marine","version":"1.0","type":"link"}