{"product_id":"ngk-cr5hsb-spark-plug-6535","title":"NGK CR5HSB Spark Plug — 10mm, Heat Range 5, Resistor (NGK 6535)","description":"\u003ch2\u003eGenuine NGK CR5HSB Spark Plug\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eNGK CR5HSB (NGK 6535)\u003c\/strong\u003e is a genuine NGK standard copper-core nickel spark plug for select portable generators, small marine outboards, utility engines, and compact power equipment where the manufacturer specifies the CR5HSB \/ NGK 6535 plug profile. It is a compact 10 mm, short-reach, resistor-style plug with a flat gasket seat and solid terminal.\u003c\/p\u003e\u003cp\u003eInstall only where the engine service manual, equipment label, or factory application chart specifically calls for \u003cstrong\u003eNGK CR5HSB\u003c\/strong\u003e, \u003cstrong\u003eNGK 6535\u003c\/strong\u003e, or an approved equivalent.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eGenuine NGK standard spark plug\u003c\/li\u003e\n\u003cli\u003eNGK part number: \u003cstrong\u003eCR5HSB\u003c\/strong\u003e | NGK stock number: \u003cstrong\u003e6535\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eCopper-core nickel construction for standard small-engine service\u003c\/li\u003e\n\u003cli\u003eResistor-style plug to reduce ignition-related RFI noise\u003c\/li\u003e\n\u003cli\u003eCompact short-reach design for select small engines and portable equipment\u003c\/li\u003e\n\u003cli\u003eThread diameter: \u003cstrong\u003e10 mm \/ M10 × 1.0\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eThread reach: \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\u003eSeat style: \u003cstrong\u003eflat \/ gasket seat\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eTip style: \u003cstrong\u003enon-projected\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eHeat range: \u003cstrong\u003e5\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eFactory preset gap reference: \u003cstrong\u003e0.028 in. \/ 0.7 mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSolid terminal configuration\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eApplication Compatibility\u003c\/h2\u003e\u003cp\u003eCommon applications where the factory plug chart calls for NGK CR5HSB \/ 6535:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSelect Honda portable inverter generator applications where specified\u003c\/li\u003e\n\u003cli\u003eSelect Honda small-engine applications using Honda plug references \u003cstrong\u003e98056-55757\u003c\/strong\u003e or \u003cstrong\u003e98056-55777\u003c\/strong\u003e, where confirmed by engine model\u003c\/li\u003e\n\u003cli\u003eSelect compact marine outboards and small outboard applications where the factory chart calls for CR5HSB\u003c\/li\u003e\n\u003cli\u003eSelect utility engines, commercial compactors, trimmers, and small power equipment where specified\u003c\/li\u003e\n\u003cli\u003eOther small-engine applications requiring a 10 mm, 12.7 mm reach, gasket-seat plug with the correct heat range and terminal style\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eUse this spark plug only where the equipment manufacturer’s application chart specifically lists \u003cstrong\u003eCR5HSB\u003c\/strong\u003e, \u003cstrong\u003e6535\u003c\/strong\u003e, or an approved equivalent.\u003c\/p\u003e\u003ch2\u003eFitment Notice\u003c\/h2\u003e\u003cp\u003eConfirm fitment by exact equipment brand, engine model, serial number, service manual, and factory spark plug chart before ordering. Small-engine spark plugs can look similar but differ in thread reach, heat range, seat style, terminal style, 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\u003ch2\u003eWhen This Part Needs Replacement\u003c\/h2\u003e\u003cp\u003eReplace spark plugs during scheduled tune-up service or whenever the plug is worn, fouled, fuel-soaked, oil-contaminated, corroded, cracked, or damaged, or is causing hard starting, rough idle, stalling, weak acceleration, or no-start conditions. Portable generators and small outboards should have spark plugs inspected regularly as low-load operation, old fuel, moisture, and seasonal storage can accelerate fouling.\u003c\/p\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\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. This is a gasket-seat plug — confirm the sealing washer is present and seats properly. Avoid adding anti-seize unless specifically called for by the engine or plug manufacturer, as lubricant can alter clamping load and increase the risk of over-tightening in small aluminum cylinder heads.\u003c\/p\u003e\u003ch2\u003eCross-Reference Part Numbers\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNGK:\u003c\/strong\u003e CR5HSB (part number), 6535 (stock number)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHonda:\u003c\/strong\u003e 98056-55757 — verify by engine model and plug chart\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHonda:\u003c\/strong\u003e 98056-55777 — verify by engine model and plug chart\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDenso:\u003c\/strong\u003e U16FSR-UB \/ U16FSRUB — verify by application\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChampion:\u003c\/strong\u003e Z9Y — verify by application\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTorch:\u003c\/strong\u003e A5RTC — aftermarket cross-reference; verify by application\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eParts Desk Insights\u003c\/h2\u003e\u003cp\u003eSKU \u003cstrong\u003eNGK-CR5HSB\u003c\/strong\u003e is a compact 10 mm spark plug under the NGK brand, commonly used in small engines where space, vibration, and low-load running are major factors. Match by exact plug number, reach, heat range, and gap rather than by equipment category alone. For generators and small outboards, a fresh plug is typically part of seasonal service alongside clean fuel, oil service, and air-filter inspection.\u003c\/p\u003e","brand":"WEST","offers":[{"title":"Default Title","offer_id":43564191055908,"sku":"NGK-CR5HSB","price":7.44,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/ffcd5bbe-642e-4564-93fd-fff6d0bc0bfe.png?v=1781202934","url":"https:\/\/marisolmarine.com\/products\/ngk-cr5hsb-spark-plug-6535","provider":"Marisol Marine Company","version":"1.0","type":"link"}