Fourtry 2105200317A 21-inch blade front view shows mulching design for clean yard cuts.
Fourtry 2105200317A 21-inch blade side view highlights durable edge for tough mowing.
Fourtry replacement blade packaging ready for installation and compatibility notes.
Fourtry 21-inch mulching blade close-up reveals sharp-edged mulch design.
Fourtry 2105200317A blade center hole view confirms compatibility and proper fit.
Fourtry replacement blade label demonstrates compatibility information for quick ID.

Fourtry

Fourtry Replacement 21-Inch Mower Blade 2105200317A – Mulching Blade for HyperTough Murray BlackMax Walk-Behind

High-performance patio lawn and garden made for confident daily results

$31.76

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Why customers choose Cera Garden

Overview

Upgrade your mower with the Fourtry Replacement 21-Inch Mower Blade, model 2105200317A. This mulching blade is designed to fit a range of popular walk-behind mowers, delivering a steady, even cut across varied lawn conditions. The blade’s robust construction and precise balance aim to provide consistent performance, helping you maintain a neat, lawn-ready surface without frequent blade changes.

Designed with real-life yard tasks in mind, this blade works well when mowing tall grass or dense vegetation, and is built to withstand common yard debris like sand and stones that can dull lesser blades. While outcomes depend on mower condition and mowing patterns, the blade is engineered to offer a dependable cutting edge and a smoother mowing experience.

Key specs and design

  • Blade length: 21 inches
  • Width: 2-1/4 inches
  • Thickness: 0.1495 inches
  • Center hole: circular
  • Blade type: mulching blade

Compatibility and fit

  • Fits Hyper Tough 20-inch Walk Behind Mower MNA152701
  • Fits Murray 21-inch Walk-Behind Mower models MNA152901, MNA152903, MNA152905
  • Also listed as replacement for 2105200317A and 84005221
  • Before ordering, confirm your spindle pattern and part number on the blade you’re replacing

Installation tips

  • Disconnect the spark plug and secure the mower for safety
  • Use a block of wood to hold the blade in place, then remove the bolt
  • Align the new blade with the same directional arrows as the old blade and reassemble
  • Ensure the blade faces the correct direction to prevent abnormal wear

Real-world use scenarios

Imagine mowing a sunny backyard with tall, spring growth. The mulching design can recycle clippings as you go, helping keep the area tidy without frequent rake-and-bag tasks. The blade’s edge is built to deliver clean, consistent passes through dense patches, which can speed up routine maintenance.

In more challenging zones, such as edges near flower beds or gravel drives, the blade’s geometry is intended to provide steady performance, even when small stones are encountered. While actual results depend on mower condition and mowing technique, this blade offers a practical upgrade for many compatible models.

What’s in the package

  • 1 x Fourtry 21-inch mulching mower blade

FAQ

Q: Does this blade fit my Hyper Tough/Murray BlackMax mower?

A: Yes, if your mower uses part numbers 2105200317A or 84005221 and models MNA152701, MNA152901, MNA152903, or MNA152905.

Q: How easy is installation?

A: Disconnect the spark plug, secure the blade, remove the bolt, and mount the new blade following the directional arrows.

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