{"product_id":"default-21","title":"NGK Spark Plug - BPR4ES","description":"\u003cp\u003eThe \u003cstrong\u003eNGK BPR4ES\u003c\/strong\u003e is a standard copper-core nickel spark plug used in select small engines, utility equipment, ATVs, powersports applications, and outdoor power equipment where the manufacturer specifies the \u003cstrong\u003eBPR4ES \/ NGK 6578\u003c\/strong\u003e plug profile. It features a projected insulator nose, built-in resistor, 14 mm gasket-seat body, and NGK's standard nickel firing-end construction for dependable everyday ignition service in compatible engines.\u003c\/p\u003e\n\u003cp\u003eThis plug should be installed only where the engine service manual, equipment label, or factory application chart specifically calls for \u003cstrong\u003eNGK BPR4ES\u003c\/strong\u003e, \u003cstrong\u003eNGK 6578\u003c\/strong\u003e, or an approved equivalent.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine NGK standard spark plug.\u003c\/li\u003e\n\u003cli\u003eNGK part number: \u003cstrong\u003eBPR4ES\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eNGK stock number: \u003cstrong\u003e6578\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eCopper-core nickel construction for standard service applications.\u003c\/li\u003e\n\u003cli\u003eBuilt-in resistor to help reduce ignition-related RFI noise.\u003c\/li\u003e\n\u003cli\u003eProjected insulator nose design.\u003c\/li\u003e\n\u003cli\u003eThread diameter: \u003cstrong\u003e14 mm \/ M14 x 1.25\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eThread reach: \u003cstrong\u003e19 mm \/ 3\/4 in.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eHex size: \u003cstrong\u003e13\/16 in. \/ 21 mm\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eSeat style: \u003cstrong\u003eflat \/ gasket seat\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eHeat range: \u003cstrong\u003e4\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eFactory preset gap reference: \u003cstrong\u003e0.032 in. \/ 0.8 mm\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eCommonly used in select small-engine, lawn care, ATV, generator, pressure washer, and utility-equipment applications where specified.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eApplication Compatibility\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eCommon application context includes select engines and equipment where the factory plug chart calls for \u003cstrong\u003eNGK BPR4ES \/ 6578\u003c\/strong\u003e, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSelect small air-cooled utility engines where specified\u003c\/li\u003e\n\u003cli\u003eSelect Kawasaki-powered lawn and turf equipment where specified\u003c\/li\u003e\n\u003cli\u003eSelect pressure washer, generator, chipper, and outdoor power equipment applications where specified\u003c\/li\u003e\n\u003cli\u003eSelect ATV, utility cart, and powersports applications where the manufacturer lists \u003cstrong\u003eBPR4ES\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eOther equipment requiring a 14 mm, 19 mm reach, gasket-seat resistor plug with projected-tip construction\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUse this spark plug only where the manufacturer's application chart specifically lists \u003cstrong\u003eBPR4ES\u003c\/strong\u003e, \u003cstrong\u003e6578\u003c\/strong\u003e, or an approved equivalent.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eFitment Notice\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eConfirm fitment by exact equipment brand, engine model, serial number, service manual, and factory spark plug chart before ordering. Spark plugs with the same thread diameter can still differ in reach, heat range, seat style, projection, terminal style, resistor specification, and required gap. Installing the wrong plug can cause hard starting, misfire, poor idle, overheating, thread damage, piston contact, or ignition-system issues.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eWhen This Part Needs Replacement\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eReplace spark plugs during scheduled tune-up service or whenever the plug is worn, fouled, fuel-soaked, oil-contaminated, cracked, corroded, damaged, or causing hard starting, rough idle, hesitation, weak acceleration, misfire, or poor low-speed running. Small engines that idle frequently, run under dusty load, or sit in seasonal storage should have spark plugs inspected regularly.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eInstallation Notes\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eCheck the plug number and required gap against the engine service chart before installation. Install into clean, undamaged cylinder head threads and tighten to the manufacturer's torque specification for the exact engine. Because this is a gasket-seat plug, confirm the sealing washer is present and seats correctly.\u003c\/p\u003e\n\u003cp\u003eAvoid adding anti-seize unless the engine or spark plug manufacturer specifically calls for it, as thread lubricant can change clamping load and increase the risk of over-tightening. Confirm the terminal style matches the ignition boot before installation.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAlternate\/Superseded Part Numbers\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNGK BPR4ES\u003c\/strong\u003e — spark plug part number\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNGK 6578\u003c\/strong\u003e — NGK stock number\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBPR4ES Standard\u003c\/strong\u003e — product style reference\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHonda 98079-54817\u003c\/strong\u003e — cross-reference; verify by engine model and plug chart\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHonda 98079-54846\u003c\/strong\u003e — cross-reference; verify by engine model and plug chart\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKawasaki 92070-7004\u003c\/strong\u003e — cross-reference; verify by engine model and plug chart\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKawasaki 92070-2112\u003c\/strong\u003e — cross-reference; verify by engine model and plug chart\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDenso W14EPR-U \/ W14EPRU\u003c\/strong\u003e — cross-reference; verify by application\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChampion RN11YC \/ RN12YC \/ RN14YC\u003c\/strong\u003e — cross-reference; verify by application\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eParts Desk Insight\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eBPR4ES\u003c\/strong\u003e is a hotter heat-range plug often used in small engines that spend time at light load, idle, or intermittent duty. Match it by exact plug number, reach, seat style, heat range, and required gap rather than by equipment type alone. A hotter plug can help resist carbon fouling in the right application, but the wrong heat range can create poor running or engine damage.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShipping:\u003c\/strong\u003e Ships same or next day for fast Canada wide shipping. ⚓\u003c\/p\u003e","brand":"MISC.","offers":[{"title":"Default Title","offer_id":43563930320932,"sku":"6578","price":5.49,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/3a6e3162-6e27-4722-8b79-189d4d107b66.png?v=1781207358","url":"https:\/\/marisolmarine.com\/products\/default-21","provider":"Marisol Marine Company","version":"1.0","type":"link"}