{"product_id":"ngk-bpz8h-n-10-v-power-spark-plug-4495","title":"NGK BPZ8H-N-10 V-Power Spark Plug - 4495","description":"\u003ch2\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0056\/9429\/2079\/files\/ngk_logo_1.png?v=1780608867\" alt=\"\"\u003e\u003c\/h2\u003e\n\u003ch2\u003eNGK BPZ8H-N-10 V-Power Spark Plug – 4495\u003c\/h2\u003e\n\u003cp\u003eThe NGK BPZ8H-N-10 V-Power Spark Plug, stock number 4495, is a proven replacement for select Mercury and Mariner outboard engines. Designed for reliable ignition in two-stroke marine applications, its V-groove center electrode helps concentrate the spark at the edge of the electrode for dependable combustion, smooth acceleration, and consistent performance throughout the RPM range.\u003c\/p\u003e\n\u003cp\u003eBuilt around a copper-core center electrode with a nickel firing tip, the BPZ8H-N-10 provides effective heat transfer while standing up to the demanding operating conditions found in outboard engines. Its special resistor design also helps control electrical interference that can affect onboard electronics.\u003c\/p\u003e\n\u003cp\u003eA worn or fouled plug can contribute to difficult starting, rough idle, hesitation, reduced power, and poor fuel efficiency. Installing fresh NGK 4495 spark plugs during routine maintenance helps restore proper ignition and keeps compatible Mercury-powered boats running as intended.\u003c\/p\u003e\n\u003ch3\u003eSpark Plug Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eManufacturer: NGK\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePart Number: BPZ8H-N-10\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNGK Stock Number: 4495\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDesign: V-Power\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCenter Electrode Core: Copper\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCenter Electrode Tip: Nickel with V-groove\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHeat Range: 8\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThread Diameter: 14 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThread Reach: 12.7 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHex Size: 13\/16\"\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSeat Type: Gasket \/ flat seat\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePre-Gap: .040\" \/ 1.0 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eGround Electrode: Single\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eResistor Type: Special resistor\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSold Individually\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommon Mercury \u0026amp; Mariner Engine Applications\u003c\/h3\u003e\n\u003cp\u003eThe NGK BPZ8H-N-10 \/ 4495 is used in select Mercury and Mariner outboard engines, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eMercury 6 HP 2-Stroke\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMercury 8 HP 2-Stroke\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMercury 20 HP 2-Stroke\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMercury 25 HP 2-Stroke\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMercury 30 HP applications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMercury 100 HP 2-Stroke\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMercury 115 HP 2-Stroke\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMercury 125 HP 2-Stroke\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMercury 225 HP 3.0L applications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSelect Mariner 2-Stroke outboards\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eApplication years vary significantly by horsepower and engine family. For example, the BPZ8H-N-10 is listed for select Mercury 20 HP and 25 HP two-strokes from the early 1990s and 2001–2006, along with certain larger Mercury two-stroke engines.\u003c\/p\u003e\n\u003ch3\u003eCommon Boat Applications\u003c\/h3\u003e\n\u003cp\u003eBecause Mercury and Mariner outboards were installed by many boat manufacturers, the NGK 4495 may be found in compatible engine packages used on boats such as:\u003c\/p\u003e\n\u003ch4\u003eBoston Whaler\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eBoston Whaler Sport\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBoston Whaler Montauk\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBoston Whaler Dauntless\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eTracker\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eTracker Pro Team\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTracker Pro Guide\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTracker Targa\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eLund\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eLund Rebel\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLund Adventure\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLund Pro-V\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSea Pro\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eSea Pro Center Console models\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSea Pro Bay Boat models\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCarolina Skiff\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eCarolina Skiff J-Series\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCarolina Skiff DLX Series\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCarolina Skiff center console models\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eBayliner\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eBayliner Capri\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBayliner Trophy\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSelect Mercury-powered runabout models\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAdditional applications may include older Ranger, Nitro, Key West, Mako, Grady-White, Sea Ray, Princecraft, Lowe, Alumacraft, and other boats originally equipped with a compatible Mercury or Mariner outboard.\u003c\/p\u003e\n\u003ch3\u003eMercury \/ Quicksilver Cross References\u003c\/h3\u003e\n\u003cp\u003eThe NGK BPZ8H-N-10 \/ 4495 cross-references with select Mercury Marine spark plug numbers, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eMercury 33-816837Q\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMercury 33-816837B2\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMercury \/ MerCruiser 33-8168372\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNGK BPZ8H-N-10\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNGK 4495\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAlways verify the original plug number before using a cross-reference for replacement.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eGenuine NGK BPZ8H-N-10 V-Power spark plug\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNGK stock number 4495\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDesigned for select Mercury and Mariner marine engines\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eV-groove electrode promotes dependable ignition\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCopper core provides efficient heat transfer\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSpecial resistor construction helps suppress electrical interference\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e.040-inch factory gap specification\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIdeal for routine outboard maintenance and tune-ups\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProven replacement for select Mercury 33-816837-series plugs\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eReliable Performance for Mercury Two-Stroke Outboards\u003c\/h3\u003e\n\u003cp\u003eTwo-stroke outboards depend heavily on proper spark plug condition for clean starting, smooth acceleration, and consistent power. Carbon deposits, electrode wear, or incorrect plug specifications can quickly affect how an engine performs. The NGK BPZ8H-N-10 provides a proven replacement option for compatible Mercury and Mariner engines, making it an excellent choice for seasonal service or a complete ignition tune-up.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment Note:\u003c\/strong\u003e Mercury used different spark plugs within the same horsepower ranges depending on model year, serial number, and engine configuration. Do not determine compatibility by boat model alone. Verify \u003cstrong\u003eNGK BPZ8H-N-10 \/ stock #4495\u003c\/strong\u003e against your Mercury or Mariner engine model, serial-number range, or original spark plug before ordering.\u003c\/p\u003e","brand":"Land 'N' Sea","offers":[{"title":"Default Title","offer_id":50252504400129,"sku":"41-BPZ8HN10","price":13.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0056\/9429\/2079\/files\/Screenshot2026-08-28173506.png?v=1787952925","url":"https:\/\/inboardpartshq.com\/products\/ngk-bpz8h-n-10-v-power-spark-plug-4495","provider":"Inboard Parts HQ","version":"1.0","type":"link"}