117-5376-03 Medium Lift 21.57" Mower Blades for Replacement for Toro 42" Deck TimeCutter ZS4200 SW4200 MX4275 0.63" Circle Center Hole 2 Pack | 117-5376-03 Mulching Blades for TimeCutter 42" Decks

What It Is

This is a 2-pack of 21.57-inch medium-lift mulching blades (OEM part 117-5376-03) designed for Toro TimeCutter 42-inch decks. They replace standard blades on ZS4200, SW4200, and MX4275 models, offering improved mulching performance and finer grass clipping breakdown.

Fitment & Compatibility

Before buying, confirm three things:

• Deck size: Only fits Toro 42-inch fabricated decks (not 50" or 60").
• Center hole: Must be 0.63" (5/8") circle – measure your current blade’s center hole.
• Model check: Fits TimeCutter ZS4200, SW4200, MX4275, and similar 42" deck models from 2015–2024. Verify your mower’s model number on the deck or frame tag.

These are OEM-equivalent aftermarket blades. They are not compatible with Toro 42" stamped steel decks (e.g., TimeCutter 42" models with a stamped deck require a different part).

Key Things to Know

• Medium lift: Good balance between bagging and mulching; won’t throw clippings as far as high-lift blades but reduces clumping.
• Installation: Easy swap – remove the old blade, clean the spindle, and torque to 55–65 ft-lbs. Use a blade removal tool to prevent spinning.
• Common gotcha: These blades are 21.57" long – measure your current blade length. Some Toro 42" decks use 21.5" blades; 0.07" difference is fine, but mismatched length can cause vibration.
• Check for bent spindles before installing; a bent spindle will wear new blades unevenly.

Should You Buy It

Yes, if you own a Toro TimeCutter with a 42" fabricated deck and want a direct replacement that mulches better than stock blades without sacrificing lift. Skip if you need high-lift for bagging or have a stamped steel deck.