Briggs & Stratton 21" Mower Blade Compatible with Snapper & Simpicity Mowers & Tractors with 61" Decks / 5101755BMYP

What It Is

This is a 21-inch replacement blade designed for Snapper and Simplicity riding mowers and tractors with a 61-inch cutting deck. It’s a direct-fit OEM blade (part number 5101755BMYP) intended for mulching or standard cutting on residential and commercial mowers.

Fitment & Compatibility

Before buying, verify three things:

• Deck size: This blade fits only 61-inch decks, not smaller or larger decks. Check your mower’s deck width (measure from side to side, not blade tip to tip).
• Model/brand: Confirmed for Snapper and Simplicity mowers/tractors with 61-inch decks. Not compatible with other brands (e.g., John Deere, Husqvarna) unless they share the same spindle pattern.
• Measurements: Blade length is 21 inches (tip to tip). Center hole diameter is 1 inch, with a 5-point star drive pattern. Measure your old blade’s length, hole size, and drive pattern to confirm. OEM part number 5101755BMYP cross-references to aftermarket options, but aftermarket blades may vary in thickness or balance.

Key Things to Know

• Quality concerns: With only 2 reviews and a 3.0 rating, expect potential durability or balance issues. Inspect the blade for warping or uneven edges before install.
• Installation difficulty: Easy—remove the center bolt, replace the blade, and torque to 70-90 ft-lbs. Use a blade removal tool or block the blade to prevent spinning.
• Common gotcha: The 5-point star drive pattern is specific to Snapper/Simplicity spindles. Aftermarket blades with a different center hole won’t fit. Always match the drive pattern, not just the length.
• Balance: After installation, check blade balance with a balancer. An unbalanced blade causes vibration, poor cut, and spindle wear.

Should You Buy It

Buy this blade only if you have a Snapper or Simplicity mower with a verified 61-inch deck and need an OEM replacement. The low rating and sparse reviews suggest caution—consider a higher-rated aftermarket blade with the same measurements (21-inch length, 1-inch center hole, 5-point star drive) for better value and reliability. If you prize exact OEM fit over cost or reviews, this is the correct part.