131-3939-03 Mower Blades Fit for T oro TimeCutter SS4200 4225 4250 Riding Mower with 42 Inch Deck, Replace 131-3939-03P, High Lift Blades Compatible with Ex Mark Quest S eries Zero Turn Mower, 2 Pack

What It Is

This is a set of two high-lift replacement blades designed for Toro TimeCutter and Ex Mark Quest zero-turn mowers with a 42-inch deck. High-lift blades create stronger airflow to improve grass clipping discharge and bagging performance, especially in thick or damp grass.

Fitment & Compatibility

• Deck size: 42-inch cutting deck only. Measure your blade length—these are 16.5 inches from tip to tip, with a 5-point star center hole and 0.75-inch diameter.
• Direct fit models: Toro TimeCutter SS4200, SS4225, SS4250; Ex Mark Quest series (e.g., QS4217, QS4220). Also replaces OEM part numbers 131-3939-03 and 131-3939-03P.
• Cross-check: Verify your mower’s deck spindle pattern (5-point star) and blade offset before ordering. Not compatible with 42-inch decks from other brands (e.g., John Deere, Craftsman) without verifying spindle dimensions.
• Aftermarket note: These are not OEM Toro/Ex Mark blades, but dimensions and mounting match factory specs. If using a mulching kit, confirm blade lift height matches your kit’s requirements.

Key Things to Know

• Installation difficulty: Easy with a socket wrench and blade removal tool (or block of wood to prevent spinning). Torque spindle bolts to 70–90 ft-lbs.
• High-lift design: Improves bagging and side discharge, but increases engine load slightly and may cause more blade wear in sandy or dusty conditions.
• Pack includes: Two blades, no hardware. Reuse your existing spindle bolts and washers unless they’re worn.
• Common gotcha: Some users report these blades sit slightly higher than OEM, reducing cut quality if deck isn’t leveled afterward. Always check blade tip height after install.

Should You Buy It

If you own a Toro TimeCutter or Ex Mark Quest with a 42-inch deck and want better bagging or discharge performance without paying OEM prices, these are a solid value at $33.99. They’re not ideal for mulching-only setups or if you prefer standard (low-lift) blades for reduced engine strain. For casual to moderate use, the 4.8-star rating and direct fit make this a safe, cost-effective upgrade.