{"product_id":"fourtry-21-replacement-mower-blades-2-pack-2105200317a-compatible-with-murray-black-max-0-1495-thick-for-clean-cut","title":"Fourtry 21\" Replacement Mower Blades 2-Pack — 2105200317A Compatible with Murray \u0026 Black Max, 0.1495\" Thick for Clean Cut","description":"\u003cp\u003e\u003cstrong\u003eThese Fourtry 21-inch replacement mower blades are a direct-fit 2-pack designed to restore cutting performance on Murray and Black Max 21\" push mowers that use part numbers 2105200317A \/ 84005221.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your mower is leaving uneven swaths, tearing grass, or the current blade is bent or worn, replacing it with the correct blade restores balance, edge retention, and a cleaner cut. These Fourtry blades match the 21\" length and oval center hole pattern used by several Murray and Black Max walk-behind models, so you can swap them in quickly and return to mowing with confidence.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I confirm these blades will fit my mower?\u003c\/h3\u003e\n\u003cp\u003eCheck the stamped or printed part number on your existing blade before ordering; it should match 2105200317A, 2105200317, or 84005221. Also verify your mower is a 21\" deck with an oval center hole and the same spindle pattern used on Murray and Black Max models.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInspect blade for part number or compare measurements.\u003c\/li\u003e\n  \u003cli\u003eBlade length: 21 inches — match to your deck size.\u003c\/li\u003e\n  \u003cli\u003eCenter hole: oval — ensure spindle compatibility.\u003c\/li\u003e\n  \u003cli\u003eCompatible models: Murray MNA152901, MNA152903 and Black Max MNA152905.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat tools and steps are required to install the replacement blades?\u003c\/h3\u003e\n\u003cp\u003eInstallation is straightforward and can be completed with basic hand tools in minutes. Always disconnect the spark plug to prevent accidental starts, secure the blade with a block of wood, remove the retaining bolt, and reattach the replacement blade in the same orientation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRequired tools: wrench or socket set, block of wood, and gloves.\u003c\/li\u003e\n  \u003cli\u003eSafety step: disconnect spark plug first.\u003c\/li\u003e\n  \u003cli\u003eOrientation: follow the directional arrows stamped on the blade.\u003c\/li\u003e\n  \u003cli\u003eTighten to the mower manufacturer’s torque specification.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat cutting performance and durability can I expect?\u003c\/h3\u003e\n\u003cp\u003eThese blades are manufactured to provide a sharp, consistent cutting edge suitable for tall grass and heavier vegetation. The steel thickness and balanced design reduce vibration and help the blade withstand contact with small debris like sand and stones.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBlade thickness: 0.1495 inches for rigidity and reduced bending.\u003c\/li\u003e\n  \u003cli\u003eWidth: 2 1\/4 inches for stable cutting and lift.\u003c\/li\u003e\n  \u003cli\u003eDesigned to resist chipping and deforming under normal lawn conditions.\u003c\/li\u003e\n  \u003cli\u003eSold as a 2-pack so you can replace worn blades in pairs when needed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre there precautions or checks I should do after installation?\u003c\/h3\u003e\n\u003cp\u003eAfter fitting the new blades, test the mower at low throttle to ensure there is no unusual vibration or noise. Recheck blade bolt tightness after the first hour of use and inspect for proper mowing pattern to confirm correct orientation and balance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRun mower briefly and inspect for vibration.\u003c\/li\u003e\n  \u003cli\u003eRe-torque blade bolt after initial run-in.\u003c\/li\u003e\n  \u003cli\u003eCheck discharge or mulching performance for even cutting.\u003c\/li\u003e\n  \u003cli\u003eKeep a record of the part number for future replacements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Homeowners and landscapers with a 21\" Murray or Black Max push mower seeking a cost-effective OEM-style blade replacement. These Fourtry blades suit users who want a quick, reliable way to restore clean cutting performance without changing mower components or adapting spindles. Verify the blade part number and spindle pattern before purchasing to ensure a correct fit.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications at a glance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLength: 21 inches\u003c\/li\u003e\n  \u003cli\u003eWidth: 2 1\/4 inches\u003c\/li\u003e\n  \u003cli\u003eThickness: 0.1495 inches\u003c\/li\u003e\n  \u003cli\u003eCenter hole: oval\u003c\/li\u003e\n  \u003cli\u003ePack: 2 replacement blades\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eNote:\u003c\/em\u003e Always follow your mower manufacturer’s safety instructions when replacing blades. If you are uncertain about compatibility, remove your old blade and confirm the printed part number before ordering.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will these blades fit my Murray MNA152903 mower?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, they are compatible with Murray MNA152903 if your old blade shows part number 2105200317A\/2105200317\/84005221 and uses an oval center hole.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How do I install the Fourtry 21\" replacement blades?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Disconnect the spark plug, secure the blade with wood, remove the bolt, fit the new blade in same direction, then tighten to the mower’s torque spec.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Fourtry","offers":[{"title":"Default Title","offer_id":56830198743380,"sku":"B0CQRFZBLQ","price":71.67,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/fourtry-front-packaging-21inch-blade.jpg?v=1787002580","url":"https:\/\/gardenluxe.co.uk\/products\/fourtry-21-replacement-mower-blades-2-pack-2105200317a-compatible-with-murray-black-max-0-1495-thick-for-clean-cut","provider":"Gardenluxe Uk","version":"1.0","type":"link"}