{"product_id":"west-1135","title":"NGK Spark Plug - BPR6EFS 3523","description":"\u003cp\u003eThe \u003cstrong\u003eNGK BPR6EFS\u003c\/strong\u003e is a resistor, projected-tip spark plug used in marine gasoline engines that specifically call for this plug style. The important specs are the \u003cstrong\u003eBPR6EFS plug code\u003c\/strong\u003e, \u003cstrong\u003eresistor design\u003c\/strong\u003e, \u003cstrong\u003eprojected firing tip\u003c\/strong\u003e, \u003cstrong\u003egasket-style seat\u003c\/strong\u003e, and correct reach\/heat range match. Spark plug reach and seat type must match the cylinder head; using the wrong seat or reach can cause sealing problems, pre-ignition, thread damage, or internal interference.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eNGK part number: \u003cstrong\u003eBPR6EFS\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eB\u003c\/strong\u003e = 14 mm thread size\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eP\u003c\/strong\u003e = projected insulator \/ projected tip\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR\u003c\/strong\u003e = resistor plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6\u003c\/strong\u003e = NGK heat range 6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eE\u003c\/strong\u003e = 19 mm \/ 3\/4 in reach\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eF\u003c\/strong\u003e = tapered\/compact plug style family designation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eS\u003c\/strong\u003e = standard copper-core electrode style\u003c\/li\u003e\n\u003cli\u003eCommonly used where a projected-tip resistor plug is specified\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eEngine Compatibility\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eFits engines that specifically call for \u003cstrong\u003eNGK BPR6EFS\u003c\/strong\u003e. This plug is commonly used in select GM-based marine engine applications, including certain MerCruiser, Volvo Penta, and other marine gasoline engines when listed in the engine service specification.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eSerial Number Fitment Notice\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eConfirm by engine model, serial number, ignition system, and service manual. Do not substitute based on thread size alone. Reach, seat style, heat range, and plug gap all matter.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eWhen This Part Needs Replacement\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eReplace during tune-ups, hard-start diagnosis, rough idle, misfire troubleshooting, fouling, poor acceleration, or after long service intervals.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eInstallation Notes\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eSet the spark plug gap to the engine manufacturer's specification before installation. Install into clean threads and torque to the correct spec for the cylinder head and plug seat type. Do not mix tapered-seat and gasket-seat plugs unless the engine manual specifically calls for that style.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAlternate\/Superseded Part Numbers\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eNGK BPR6EFS\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eParts Desk Insight\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe easy mistake is treating \u003cstrong\u003eBPR6EFS\u003c\/strong\u003e, \u003cstrong\u003eBPR6ES\u003c\/strong\u003e, and \u003cstrong\u003eBPR6FS\u003c\/strong\u003e like close substitutes. They are not automatically interchangeable. The letters define reach, tip projection, resistor construction, and plug body style, so the safest match is always the exact plug code listed for the engine.\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":"WEST","offers":[{"title":"Default Title","offer_id":43564190728228,"sku":"NGK-BPR6EFS","price":10.14,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/4bc71e9d-3416-418b-afe6-6ea17be60593.png?v=1778957366","url":"https:\/\/marisolmarine.com\/products\/west-1135","provider":"Marisol Marine Company","version":"1.0","type":"link"}