Blade, Snapper 1731898BZYP, 21-3/16"

What It Is

This Snapper 1731898BZYP blade is a 21-3/16" OEM replacement blade designed for Snapper walk-behind mowers with a 21-inch cutting deck. It’s a standard mulching or 2-in-1 (mulch/bag) blade for residential use.

Fitment & Compatibility

Before buying, check these three things:

• Deck size: This blade fits Snapper 21-inch decks only. Measure your deck width (blade tip to tip) to confirm.
• Model fit: Compatible with Snapper SPV, SPX, and many Series 21 walk-behind mowers (e.g., models with 21" steel or aluminum decks). Verify your model number in the owner’s manual or Snapper’s online fitment tool.
• OEM vs aftermarket: This is an OEM Snapper part, so it matches original specifications exactly. Aftermarket blades may differ in thickness, hole pattern, or balance.
• Measurements: Blade length is 21-3/16", center hole diameter is typically 1" (check yours), and thickness is about 0.125". Confirm your old blade matches these dimensions.

Key Things to Know

• Quality: OEM Snapper blades are heat-treated and balanced for durability and clean cuts. Expect longer life than cheap aftermarket options.
• Installation difficulty: Easy—requires a socket wrench and blade removal tool (or block wood to hold blade). Torque blade bolt to 30-40 ft-lbs. No special skills needed.
• Gotcha: This blade is for standard 21" decks only. It does not fit Snapper 20" or 22" decks, or any other brand (e.g., Toro, Honda). Check your deck’s blade bolt pattern—some Snapper models use a 5-point star hole, others a standard hex. This blade uses a standard 1" round hole with two locating pins (verify your spindle matches).
• Performance: Designed for mulching and bagging; not ideal for side-discharge only. If you need a dedicated high-lift blade for bagging, consider Snapper’s part 7025165YP instead.

Should You Buy It

If you own a Snapper 21-inch walk-behind mower and want a direct, no-guesswork OEM replacement, this blade is a solid choice. It’s priced fairly for OEM quality, installs easily, and will restore cutting performance. Skip it if your deck is a different size or you need a specialized blade for heavy-duty mulching or commercial use.