{"product_id":"west-1142","title":"NGK Spark Plug - DPR6EA-9","description":"\u003cp\u003eThe \u003cstrong\u003eNGK DPR6EA-9\u003c\/strong\u003e is a standard copper-core nickel spark plug used in select marine outboards, motorcycles, ATVs, utility vehicles, and small-engine applications where the manufacturer specifies the \u003cstrong\u003eDPR6EA-9 \/ NGK 5531\u003c\/strong\u003e plug profile. It features a resistor design to help reduce ignition noise and radio frequency interference, along with a projected insulator nose for consistent combustion-chamber spark positioning in compatible engines.\u003c\/p\u003e\n\u003cp\u003eThis plug should be installed only where the engine service manual, ignition label, or application chart specifically calls for \u003cstrong\u003eNGK DPR6EA-9\u003c\/strong\u003e, \u003cstrong\u003eNGK 5531\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\u003eDPR6EA-9\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eNGK stock number: \u003cstrong\u003e5531\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eCopper-core nickel construction for standard service applications.\u003c\/li\u003e\n\u003cli\u003eResistor-style plug to help reduce ignition-related electrical interference.\u003c\/li\u003e\n\u003cli\u003eProjected insulator nose design.\u003c\/li\u003e\n\u003cli\u003eThread diameter: \u003cstrong\u003e12 mm\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\u003e18 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\u003e6\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eFactory preset gap: \u003cstrong\u003e0.036 in. \/ 0.9 mm\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eThreaded terminal configuration.\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 marine, motorcycle, ATV, and utility-engine applications where the factory plug chart calls for \u003cstrong\u003eNGK DPR6EA-9 \/ 5531\u003c\/strong\u003e, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSelect \u003cstrong\u003eMercury \/ Mariner 9.9 HP FourStroke\u003c\/strong\u003e outboard applications where specified\u003c\/li\u003e\n\u003cli\u003eSelect Mercury applications using \u003cstrong\u003e827858Q \/ 33-827858\u003c\/strong\u003e plug references where confirmed by parts chart\u003c\/li\u003e\n\u003cli\u003eSelect \u003cstrong\u003eYamaha F15 \/ F20 \/ F25 \/ T25\u003c\/strong\u003e outboard applications where specified\u003c\/li\u003e\n\u003cli\u003eSelect Honda motorcycle and ATV applications where specified\u003c\/li\u003e\n\u003cli\u003eSelect Kawasaki, Suzuki, Triumph, and other powersports applications where the plug chart calls for this profile\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUse this spark plug only where the manufacturer's application chart specifically lists \u003cstrong\u003eDPR6EA-9\u003c\/strong\u003e, \u003cstrong\u003e5531\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 engine model, serial number, year, 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, terminal style, projected-tip design, 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, misfire, weak acceleration, or poor low-speed running. Marine outboards that troll, idle for long periods, or operate in damp and salt-air environments should have spark plugs inspected more regularly.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eInstallation Notes\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eCheck the plug number and 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 properly. Avoid adding anti-seize unless the engine or plug manufacturer specifically calls for it, as lubricant can change clamping load and increase the risk of over-tightening.\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 DPR6EA-9\u003c\/strong\u003e — spark plug part number\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNGK 5531\u003c\/strong\u003e — NGK stock number\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDPR6EA9\u003c\/strong\u003e — alternate catalog formatting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMercury 827858Q\u003c\/strong\u003e — marine reference; verify by engine serial number and plug chart\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMerCruiser \/ Mercury 33-827858\u003c\/strong\u003e — marine reference; verify by engine serial number and plug chart\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYamaha 94701-00375\u003c\/strong\u003e — cross-reference; verify by model and plug chart\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYamaha 94700-00375\u003c\/strong\u003e — cross-reference; verify by model and plug chart\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eParts Desk Insight\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eDPR6EA-9\u003c\/strong\u003e is a 12 mm, gasket-seat plug with a projected tip and 0.9 mm preset gap. It should not be substituted based only on horsepower, brand, or heat range. Matching the exact plug number to the engine's service chart helps avoid incorrect reach, sealing style, or gap issues that can lead to misfire, thread damage, or poor running.\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":43564191186980,"sku":"NGK-DPR6EA-9","price":11.1,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/bfff99a6-411c-4d15-84e9-d6b619086904.png?v=1781200240","url":"https:\/\/marisolmarine.com\/products\/west-1142","provider":"Marisol Marine Company","version":"1.0","type":"link"}