Stens New Standard Blade 340-452 for Snapper 1758878BMYP,Black

What It Is

This Stens 340-452 is a standard replacement blade for Snapper walk-behind mowers, designed for general residential lawn cutting. It fits Snapper models that use OEM part number 1758878BMYP.

Fitment & Compatibility

Before buying, confirm your mower deck size (typically 21” for these Snapper models). Check your current blade’s part number—this Stens blade replaces Snapper OEM 1758878BMYP, 7050181YP, and 7050182YP. Measure the blade length (21 inches), center hole diameter (5/8”), and air lift (if present). This is an aftermarket blade, not OEM Snapper, so verify that the offset and thickness match your original. Use a dealer lookup or Snapper’s website with your mower model number (e.g., SPV21, P21500) to confirm.

Key Things to Buy

• Quality: Stens is a reputable aftermarket brand; this blade is made from hardened steel and should last a season with normal use. It’s balanced out of the box.
• Installation: Straightforward—remove spark plug, lift mower, remove center bolt, swap blade. Torque the bolt to 40-50 ft-lbs. Use a blade balancer if you’re picky.
• Gotchas: The blade may be slightly lighter than OEM, which can affect cut quality on thick grass. Also, check that the blade’s air lift matches your deck’s design—some Snapper decks need specific lift for proper discharge.
• Sharpening: This blade can be sharpened, but replacement is cheap enough that most users just swap.

Should You Buy It

Buy this if you need a reliable, budget-friendly replacement for a Snapper 21” walk-behind and don’t require OEM-level fit or durability. It’s fine for average lawns, but if you cut tough, overgrown grass or want the exact OEM feel, spend more on a genuine Snapper blade.