{"product_id":"champion-rv8c-spark-plug-121-4-pack-non-resistor-marine-inboard-volvo-penta-24-rv8c","title":"Champion RV8C Spark Plug | #121 | 4-Pack | Non-Resistor Marine Inboard \u0026 Volvo Penta","description":"\u003ch2\u003eNon-Resistor Spark Plug for Volvo Penta and Marine Inboard Engines — 4-Pack.\u003c\/h2\u003e\u003cp\u003eThe Champion RV8C is a non-resistor marine spark plug designed for Volvo Penta and other marine inboard engines that specifically require a non-resistor plug. Part number 121, the C-suffix design uses a copper core electrode for reliable heat transfer and consistent spark — without a built-in resistor, making it the correct choice for older ignition systems that are not compatible with resistor-type plugs.\u003c\/p\u003e\u003cp\u003eSold in a 4-pack. Always verify fitment against your engine's owner's manual or Champion application guide before ordering — using a resistor plug in a non-resistor application (or vice versa) can cause ignition issues on some older marine inboard systems.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eChampion RV8C marine spark plug — 4-pack (Champion #121)\u003c\/li\u003e\n\u003cli\u003eNon-resistor design — for engines that specifically require a non-resistor spark plug\u003c\/li\u003e\n\u003cli\u003eCopper core electrode for reliable heat transfer and consistent spark\u003c\/li\u003e\n\u003cli\u003eV-thread hex — correct thread form for Volvo Penta and compatible marine inboard applications\u003c\/li\u003e\n\u003cli\u003eDesigned for older marine inboard and sterndrive engine applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eVolvo Penta inboard and sterndrive engines specifying Champion RV8C or equivalent\u003c\/li\u003e\n\u003cli\u003eOlder marine inboard engines requiring a non-resistor V-thread spark plug\u003c\/li\u003e\n\u003cli\u003eAny application cross-referencing Champion #121\u003c\/li\u003e\n\u003cli\u003eVerify fitment using your engine's owner's manual or the Champion spark plug application guide\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\u003cp\u003eThe RV8C is the non-resistor version of the RV-series family — if your engine's manual specifies a non-resistor plug, the RV8C is the correct choice. Older Volvo Penta and marine inboard ignition systems sometimes require non-resistor plugs because the ignition module itself handles interference suppression. Using a resistor plug in these systems can reduce spark energy and cause misfires.\u003c\/p\u003e\u003cp\u003eIf your engine specifies a resistor plug in the RV-series, see the \u003ca href=\"\/products\/champion-rv12yc-spark-plug-406-4-pack-volvo-penta-marine-inboard-24-rv12yc\"\u003eChampion RV12YC #406\u003c\/a\u003e or the \u003ca href=\"\/products\/champion-rv15yc4-spark-plug-18-4-pack-4-electrode-marine-inboard-volvo-penta-24-rv15yc4\"\u003eChampion RV15YC4 #18\u003c\/a\u003e. For MerCruiser and GM V8-based inboard applications, see the \u003ca href=\"\/products\/champion-rn12yc-spark-plug-404-4-pack-mercruiser-sterndrive-marine-inboard-24-rn12yc\"\u003eChampion RN12YC #404\u003c\/a\u003e.\u003c\/p\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51250815762468,"sku":"24-RV8C","price":8.93,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/24-L76V_a190adce-1a05-430b-bd16-a63bf0b30ac4.jpg?v=1786510612","url":"https:\/\/marisolmarine.com\/products\/champion-rv8c-spark-plug-121-4-pack-non-resistor-marine-inboard-volvo-penta-24-rv8c","provider":"Marisol Marine Company","version":"1.0","type":"link"}