42" Deck Mower Blades Fit for Toro Timcutter 75746 4225 4200 74711 74726 74705 Exmark Quest Z-Zero Turn Mower Replaces OEM Toro 137-1999-03

What It Is

This is a set of three 42-inch mower blades designed for Toro Timcutter and Exmark Quest zero-turn mowers. They replace OEM part Toro 137-1999-03 and are meant for cutting grass on residential or commercial properties with 42" deck models.

Fitment & Compatibility

Before buying, verify your mower model and deck size:

• Deck size: Must be exactly 42 inches. Measure your deck width if unsure.
• Compatible models: Toro Timcutter 75746, 4225, 4200, 74711, 74726, 74705; Exmark Quest zero-turn mowers with 42" decks.
• OEM replacement: Direct replacement for Toro 137-1999-03. Check your current blade part number under the deck or in your manual.
• Measurements: Each blade is approximately 21.5 inches long, 2.5 inches wide, with a 1-inch center hole and 5/8-inch diameter. Verify these match your old blades.
• Center hole: Must be round, not star-shaped. If your mower uses a star-center blade, this set won’t work.

Key Things to Know

• Quality: Aftermarket blades (not OEM) at a lower price. Some users report slightly thinner steel compared to genuine Toro blades, but they cut well for routine mowing.
• Installation difficulty: Easy, with basic tools (socket wrench, torque wrench). Remove the old blades, install new ones with the lift wings pointing up toward the deck. Torque bolts to 70-90 ft-lbs.
• Common gotcha: These blades may require balancing before use. Use a blade balancer to avoid vibration, which can damage the spindle.
• Sharpening: They come pre-sharpened but will dull faster in sandy or rocky soil. Sharpen or replace every 25-50 hours of use.

Should You Buy It

If you own a compatible Toro Timcutter or Exmark Quest with a 42" deck and want a budget-friendly alternative to OEM blades, these are a solid choice. They’re fine for regular residential mowing but may wear faster than genuine Toro blades under heavy use. Check fitment carefully—especially the center hole shape—before ordering.