Rotary 21 3/16" #12852 Lawnmower Blade Snapper/Kees 1731898 1731898A 1731898BZ

What It Is

This is a 21 3/16-inch rotary lawnmower blade designed for Snapper and compatible Kees models. It’s a replacement blade for cutting grass on residential or commercial walk-behind mowers, typically with a 21-inch deck.

Fitment & Compatibility

• Deck size: Use only on mowers with a 21-inch cutting deck. The blade length is 21 3/16 inches, so it must match your deck’s specified size exactly.
• Model numbers: Fits Snapper models using OEM part numbers 1731898, 1731898A, or 1731898BZ. Also fits some Kees models—check your manual or existing blade for these numbers.
• OEM vs. aftermarket: This is an aftermarket blade, not OEM Snapper. It’s built to the same specs but verify center hole diameter (typically 7/8-inch) and offset before purchase.
• What to check before buying: Measure your current blade’s length (from tip to tip), center hole size, and overall shape. Confirm your mower’s deck size is 21 inches. Cross-reference your model number with the 1731898 series.

Key Things to Know

• Quality: High rating (5.0/5 from 5 reviews) suggests good balance and sharpness, but limited reviews means long-term durability is unproven.
• Installation: Simple bolt-on replacement—remove the old blade, install this one with the correct orientation (sharp edge facing forward), and torque to manufacturer specs (typically 30-40 ft-lbs).
• Gotcha: Aftermarket blades may have slight variations in thickness or balance. Always balance the blade after installation to avoid vibration and mower damage.
• Common use: Best for standard grass cutting; not designed for mulching or bagging unless your deck supports it.

Should You Buy It

Buy this blade if you need a budget-friendly, direct replacement for a 21-inch Snapper or Kees mower with the 1731898 series part number. It’s a solid choice for basic cutting, but if you want guaranteed OEM fit or plan to use it heavily, consider the Snapper-branded original.