42" Deck Replacement Lawn Mower High Lift Blade for 131-3939-03 131-3939-03P 106-22747-03 - Compatible with Toro TimeCutter SS4200 MX4250 Riding Mower Exmark Quest Series Zero Turn Mower - 2 Pack

What It Is

This is a 42-inch deck high lift blade set (2-pack) designed for improved grass clipping discharge and bagging performance. It fits select Toro TimeCutter and Exmark Quest zero-turn mowers, typically used on residential or light commercial properties.

Fitment & Compatibility

Before buying, confirm these specifics:

• Deck size: Must be exactly 42 inches – measure your deck width between blade tip paths.
• Model match: Replaces OEM numbers 131-3939-03, 131-3939-03P, and 106-22747-03. Fits Toro TimeCutter SS4200, MX4250, and Exmark Quest series zero-turn mowers. Does not fit other deck sizes or non-listed models.
• Blade measurements: Center hole diameter is typically 1-inch (verify on your spindle), blade length is 21 inches, and thickness is about 0.25 inches. Measure your current blade to confirm.
• OEM vs aftermarket: This is a direct replacement aftermarket blade, not an OEM Toro or Exmark part. Check that the blade shape and lift curve match your spindle design to avoid clearance issues.

Key Things to Know

• High lift design: These blades create more upward airflow than standard blades, improving discharge and bagging but increasing engine load and noise slightly.
• Installation difficulty: Easy – requires a socket wrench and blade removal tool. Torque bolts to 70-90 ft-lbs. Always disconnect the spark plug first.
• Common gotcha: High lift blades can dull faster in sandy or gritty soil conditions. Inspect edges after heavy use and sharpen as needed.
• Quality notes: Aftermarket blades may have slightly looser tolerances than OEM. Check balance before installing by hanging the blade on a nail or using a balancer.

Should You Buy It

This is a solid budget option if you have one of the listed Toro or Exmark 42-inch zero-turn mowers and need reliable high lift blades for bagging or side discharge. It’s not ideal if you prefer OEM parts for exact fit or mow in very abrasive conditions that accelerate wear. For $28 for a 2-pack, it offers good value for regular homeowners.