{"product_id":"ngk-bpr6efs-spark-plug-replaces-mercury-marine-33-816336q-fits-mercruiser-volvo-penta-omc-inboard-engines","title":"NGK BPR6EFS Spark Plug, Replaces Mercury Marine 33-816336Q, Fits MerCruiser, Volvo Penta, OMC Inboard Engines","description":"\u003cp\u003eThe NGK BPR6EFS is a standard marine spark plug built around a solid copper core for efficient heat dissipation and reliable ignition performance. It uses a threaded, removable-nut terminal for easy installation and removal, and is engineered to promote longer service life and consistent operation in marine inboard applications. The BPR6EFS is designed to fit most popular inboard engines, including Indmar, Marine Power, MerCruiser, OMC, Redline, and Volvo Penta powerplants, as well as Boston Whaler jet boat engines. It carries a 14mm shell thread with a tapered seat, a 5\/8 inch (16mm) hex, and an 18mm (.709 inch) reach, with a factory-set gap of.031 inch (0.8mm). The center electrode uses a projected, standard 2.5mm nickel-tipped design with a copper core, paired with a standard nickel ground electrode, giving a heat range of 6 and a rated service life of 30,000 miles. This plug is a direct replacement for Mercury Marine 33-816336Q and is sold individually, so be sure to order the correct quantity for your engine's cylinder count. Always check your engine and maintenance manual to confirm this is the correct spark plug for your application, and only install plugs recommended by your engine's original equipment manufacturer -- using the wrong plug can reduce performance, lower fuel economy, or cause engine damage.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e NGK\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e BPR6EFS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShell Thread Size:\u003c\/strong\u003e 14 millimeters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Pitch:\u003c\/strong\u003e 1.25 millimeters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat Type:\u003c\/strong\u003e Tapered\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResistor:\u003c\/strong\u003e Yes, 5K Ohm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReach:\u003c\/strong\u003e 18 millimeters (0.709 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHex Size:\u003c\/strong\u003e 5\/8 inch (16 millimeters)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal Type:\u003c\/strong\u003e Removable Nut\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpark Plug Gap:\u003c\/strong\u003e 0.031 inch (0.8 millimeters)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCenter Electrode:\u003c\/strong\u003e Nickel tip, copper core, standard 2.5 millimeters, projected\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGround Electrode:\u003c\/strong\u003e Nickel, standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat Range:\u003c\/strong\u003e 6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLongevity:\u003c\/strong\u003e 30,000 miles\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 (sold individually)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTorque Spec, Cast Iron Cylinder Head:\u003c\/strong\u003e 18 to 25.3 lb-ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTorque Spec, Aluminum Cylinder Head:\u003c\/strong\u003e 18 to 21.6 lb-ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 087295136232\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.15 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eIndmar inboard engines\u003c\/li\u003e\n\u003cli\u003eMarine Power inboard engines\u003c\/li\u003e\n\u003cli\u003eMerCruiser inboard engines\u003c\/li\u003e\n\u003cli\u003eOMC inboard engines\u003c\/li\u003e\n\u003cli\u003eRedline inboard engines\u003c\/li\u003e\n\u003cli\u003eVolvo Penta inboard engines\u003c\/li\u003e\n\u003cli\u003eBoston Whaler jet boat engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury Marine 33-816336Q\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the NGK BPR6EFS spark plug fit?\u003c\/strong\u003e The NGK BPR6EFS is designed to fit most popular marine inboard engines, including Indmar, Marine Power, MerCruiser, OMC, Redline, and Volvo Penta engines, as well as Boston Whaler jet boat engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the BPR6EFS a direct replacement for Mercury Marine 33-816336Q?\u003c\/strong\u003e Yes, the NGK BPR6EFS spark plug replaces Mercury Marine part number 33-816336Q.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the thread size and reach of this spark plug?\u003c\/strong\u003e The BPR6EFS has a 14 millimeter shell thread with a tapered seat and an 18 millimeter (0.709 inch) reach.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the factory gap setting on the NGK BPR6EFS?\u003c\/strong\u003e This spark plug is set to a gap of 0.031 inch (0.8 millimeters) from the factory.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the BPR6EFS have a resistor?\u003c\/strong\u003e Yes, the NGK BPR6EFS includes a resistor rated at 5K Ohm.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat materials are used in the electrodes?\u003c\/strong\u003e The BPR6EFS uses a nickel-tipped center electrode over a copper core, along with a standard nickel ground electrode, for efficient heat dissipation and reliable spark performance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many spark plugs come in a purchase?\u003c\/strong\u003e The NGK BPR6EFS is sold individually, one spark plug per unit, so order enough to match your engine's cylinder count.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the heat range and expected service life of this plug?\u003c\/strong\u003e The BPR6EFS has a heat range of 6 and a rated longevity of 30,000 miles under normal use.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat torque should be used when installing the BPR6EFS?\u003c\/strong\u003e Torque the NGK BPR6EFS to 18-25.3 lb-ft in a cast iron cylinder head, or 18-21.6 lb-ft in an aluminum cylinder head.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size wrench or socket is needed to install this spark plug?\u003c\/strong\u003e The BPR6EFS uses a 5\/8 inch (16 millimeter) hex, and the terminal is a removable nut type.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if the BPR6EFS is the correct plug for my engine?\u003c\/strong\u003e Always check your engine's maintenance manual before installing the NGK BPR6EFS, since using the wrong spark plug can reduce performance, lower fuel economy, or damage your engine.\u003c\/p\u003e","brand":"NGK Spark Plugs","offers":[{"title":"Default Title","offer_id":49028253352155,"sku":"NGK-BPR6EFS","price":5.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/BPR6EFS__62984.1737862152.500.750.jpg?v=1785165221","url":"https:\/\/www.goodvibesmarina.com\/products\/ngk-bpr6efs-spark-plug-replaces-mercury-marine-33-816336q-fits-mercruiser-volvo-penta-omc-inboard-engines","provider":"Good Vibes Marina","version":"1.0","type":"link"}