{"product_id":"west-1139","title":"NGK Spark Plug - CR5EH-9","description":"\u003cp\u003eThe \u003cstrong\u003eNGK CR5EH-9\u003c\/strong\u003e is a standard copper-core nickel spark plug used in select small four-stroke marine outboards, utility engines, generators, pumps, and compact power equipment where the manufacturer specifies the \u003cstrong\u003eCR5EH-9 \/ NGK 6689\u003c\/strong\u003e plug profile. It uses a compact 10 mm shell, resistor construction, partial-thread long-reach layout, and factory \u003cstrong\u003e0.9 mm \/ 0.036 in.\u003c\/strong\u003e gap for compatible engines that require this specific plug design.\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 CR5EH-9\u003c\/strong\u003e, \u003cstrong\u003eNGK 6689\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\u003eCR5EH-9\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eNGK stock number: \u003cstrong\u003e6689\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\u003eCompact 10 mm plug body for small-engine cylinder heads.\u003c\/li\u003e\n\u003cli\u003ePartial-thread \/ half-thread style reach layout.\u003c\/li\u003e\n\u003cli\u003eThread diameter: \u003cstrong\u003e10 mm \/ M10 x 1.0\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eTotal reach: \u003cstrong\u003e19 mm \/ 3\/4 in.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eThreaded portion reference: \u003cstrong\u003e12.7 mm \/ 1\/2 in.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eHex size: \u003cstrong\u003e16 mm \/ 5\/8 in.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eHeat range: \u003cstrong\u003e5\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\u003eTerminal style: \u003cstrong\u003ethreaded stud\u003c\/strong\u003e.\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 and utility engines where the factory plug chart calls for \u003cstrong\u003eNGK CR5EH-9 \/ 6689\u003c\/strong\u003e, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSelect \u003cstrong\u003eHonda BF8D\u003c\/strong\u003e FourStroke outboard applications where specified\u003c\/li\u003e\n\u003cli\u003eSelect \u003cstrong\u003eHonda BFP8D\u003c\/strong\u003e high-thrust outboard applications where specified\u003c\/li\u003e\n\u003cli\u003eSelect \u003cstrong\u003eHonda BF9.9D \/ BFP9.9D\u003c\/strong\u003e FourStroke outboard applications where specified\u003c\/li\u003e\n\u003cli\u003eSelect \u003cstrong\u003eHonda BF15D \/ BFP15D\u003c\/strong\u003e FourStroke outboard applications where specified\u003c\/li\u003e\n\u003cli\u003eSelect \u003cstrong\u003eHonda BF20D \/ BFP20D\u003c\/strong\u003e FourStroke outboard applications where specified\u003c\/li\u003e\n\u003cli\u003eSelect compact generator, pump, and industrial small-engine applications requiring the same 10 mm partial-thread plug profile\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUse this spark plug only where the manufacturer's application chart specifically lists \u003cstrong\u003eCR5EH-9\u003c\/strong\u003e, \u003cstrong\u003e6689\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, model year, service manual, and factory spark plug chart before ordering. Spark plugs with the same 10 mm thread diameter can still differ in reach, thread length, heat range, seat style, terminal type, resistor specification, projection, 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, corroded, cracked, damaged, or causing hard starting, rough idle, weak acceleration, misfire, poor low-speed running, or no-start conditions. Small four-stroke outboards and utility engines that idle for long periods, troll at low speed, or sit in seasonal storage should have 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. Avoid adding anti-seize unless the engine or spark plug manufacturer specifically calls for it, as lubricant can change clamping load and increase the risk of over-tightening in small aluminum cylinder heads.\u003c\/p\u003e\n\u003cp\u003eFor 10 mm plugs in small aluminum cylinder heads, use a torque wrench and follow the engine manufacturer's exact specification. Do not force the plug if resistance is felt; stop and inspect the threads before continuing.\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 CR5EH-9\u003c\/strong\u003e — spark plug part number\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNGK 6689\u003c\/strong\u003e — NGK stock number\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCR5EH9\u003c\/strong\u003e — alternate catalog formatting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHonda 98059-55916\u003c\/strong\u003e — cross-reference; verify by engine model and plug chart\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHonda 98059-55926\u003c\/strong\u003e — Honda reference; verify by engine model and plug chart\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDenso U16FER-9 \/ U16FER9\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\u003eCR5EH-9\u003c\/strong\u003e should not be substituted by thread size alone. Its partial-thread reach layout is application-specific, and the wrong 10 mm plug can seat incorrectly or place the firing end at the wrong depth in the chamber. Matching the exact plug number, gap, terminal style, and service chart helps prevent ignition issues and protects small aluminum cylinder heads.\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":43564190990372,"sku":"NGK-CR5EH-9","price":34.78,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/bc7f4eca-8dab-4351-b173-7a471c21a1ed.png?v=1781203536","url":"https:\/\/marisolmarine.com\/products\/west-1139","provider":"Marisol Marine Company","version":"1.0","type":"link"}