{"product_id":"volvo-penta-spark-plug-kit-21513423","title":"Volvo Penta Spark Plug Kit 21513423 | OEM Gasoline Engine Ignition Kit","description":"\u003ch2\u003eVolvo Penta Spark Plug Kit — Part #21513423\u003c\/h2\u003e\n\n\u003cp\u003eThis is the genuine OEM spark plug kit for Volvo Penta 4.3L and 5.0L GXi\/OSi gasoline marine engines. The complete kit includes the full set of pre-gapped plugs to the factory specification, making it the straightforward choice for scheduled tune-ups or ignition system restoration. Designed for a direct fit with no modification required.\u003c\/p\u003e\n\n\u003ch3\u003ePart Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 21513423\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Volvo Penta\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOfficial Product Type:\u003c\/strong\u003e Spark Plug Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem:\u003c\/strong\u003e Ignition\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New OEM\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKit Contents\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eComplete set of OEM spark plugs (quantity matches engine cylinder count)\u003c\/li\u003e\n\u003cli\u003ePre-gapped to factory specification — ready to install\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVolvo Penta 4.3L GXi, 4.3L OSi gasoline marine engines\u003c\/li\u003e\n\u003cli\u003eVolvo Penta 5.0L GXi, 5.0L OSi gasoline marine engines\u003c\/li\u003e\n\u003cli\u003eCompatibility is serial-number dependent — verify against your engine serial number and parts diagram before ordering\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Direct OEM replacement — no modification required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGap:\u003c\/strong\u003e Pre-set to factory specification\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat Range:\u003c\/strong\u003e Optimized for marine gasoline applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEstimated Weight:\u003c\/strong\u003e Approx. 0.3 kg (full kit)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBest Use Case:\u003c\/strong\u003e This kit is the right choice for annual tune-ups on 4.3L and 5.0L Volvo Penta gasoline engines, or any time you're chasing a rough idle, hard start, or noticeable drop in fuel economy. It's one of the highest-value maintenance items on these engines — fresh plugs often make a dramatic difference in throttle response and idle quality.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCommon Issues:\u003c\/strong\u003e Customers frequently contact us after noticing a rough idle or misfires that appeared gradually over a season. Fouled or worn plugs are a common culprit on engines that see a lot of low-speed trolling or short run cycles. If you're replacing plugs due to fouling, it's worth inspecting the ignition cables at the same time — deteriorated cables are often found alongside worn plugs on higher-hour engines.\u003c\/p\u003e\n\n\u003ch3\u003eService Interval\u003c\/h3\u003e\n\u003cp\u003eVolvo Penta recommends replacing spark plugs every 100–200 hours or annually, whichever comes first. Replace sooner if you notice rough idle, misfires, hard starting, or increased fuel consumption. Always refer to your engine's service manual for the exact interval for your model and serial number range.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical FAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Are the plugs pre-gapped in this kit?\u003c\/strong\u003e\u003cbr\u003eA: Yes — OEM Volvo Penta spark plug kits are pre-gapped to factory specification. Verify the gap before installation as a best practice.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I use aftermarket plugs instead?\u003c\/strong\u003e\u003cbr\u003eA: Aftermarket equivalents exist (such as Champion RV12YC or NGK BPR6EFS), but OEM plugs are spec'd to the exact heat range and thread reach for your engine. We carry both — contact us if you'd like to compare options.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I know how many plugs are in the kit?\u003c\/strong\u003e\u003cbr\u003eA: The kit is sized for your engine's cylinder count. A 4.3L V6 takes 6 plugs; a 5.0L V8 takes 8. Confirm your engine model when ordering if you're unsure.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Parts\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/volvo-penta-8-1l-v8-spark-plug-kit-3861327-price-flag\"\u003eVolvo Penta 8.1L V8 Spark Plug Kit 3861327\u003c\/a\u003e — OEM plug kit for larger V8 engines\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/volvo-penta-8-1l-v8-ignition-cable-kit-3861295\"\u003eVolvo Penta 8.1L V8 Ignition Cable Kit 3861295\u003c\/a\u003e — replace cables alongside plugs\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/volvo-penta-ignition-cable-kit-3888328\"\u003eVolvo Penta Ignition Cable Kit 3888328\u003c\/a\u003e — ignition wire set, commonly replaced at same interval\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/champion-rv12yc-spark-plug-406-4-pack-volvo-penta-marine-inboard\"\u003eChampion RV12YC Spark Plug #406 4-Pack\u003c\/a\u003e — aftermarket equivalent option\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/ngk-spark-plug-bpr6efs-3523\"\u003eNGK Spark Plug BPR6EFS 3523\u003c\/a\u003e — aftermarket alternative\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/sierra-marine-distributor-cap-18-5362\"\u003eSierra Marine Distributor Cap 18-5362\u003c\/a\u003e — related ignition system component\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VOL","offers":[{"title":"Default Title","offer_id":43563988156452,"sku":"21513423","price":150.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/fe3068ec-5d63-4884-95e9-9781d7656ff2.png?v=1772665937","url":"https:\/\/marisolmarine.com\/products\/volvo-penta-spark-plug-kit-21513423","provider":"Marisol Marine Company","version":"1.0","type":"link"}