131-3939-03 131-3939-03p 106-22747-03 High Lift Mower Blades Compatible with 42 inch Deck Toro TimeCutter SS4200 4225 MX 4250 Riding Mower Ex Mark Quest Series Zero Turn Mower (2Pack)

What It Is

These are aftermarket high-lift mower blades designed for 42-inch cutting decks on Toro TimeCutter and Ex Mark Quest series zero-turn mowers. High-lift blades create stronger airflow to lift grass for a cleaner cut, ideal for bagging or mulching in tall or damp conditions.

Fitment & Compatibility

Check these before buying:

• Deck size: Must be a 42-inch deck only. Measure your deck’s cutting width if unsure.
• Model match: Compatible with Toro TimeCutter SS4200, SS4225, MX4250, and Ex Mark Quest series zero-turn mowers. Not for other brands or deck sizes.
• OEM cross-reference: Replaces Toro OEM part numbers 131-3939-03, 131-3939-03P, and 106-22747-03. If your original blade has a different number, double-check dimensions.
• Measurements: Each blade is about 21 inches long, 2.5 inches wide, with a 1-inch center hole and ¾-inch offset. Verify these against your current blade to confirm fit.
• Quantity: Comes as a 2-pack (one for each spindle on a 42-inch deck). You may need a separate set for a 3-blade deck.

Key Things to Know

• Cut quality vs. OEM: These are aftermarket, not genuine Toro. Most users report equal or better cut, but some note slightly faster wear compared to OEM.
• Installation difficulty: Easy – remove deck, loosen spindle nut, swap blades. Torque to 70-90 ft-lbs. Use a blade removal tool or block the blade to prevent rotation.
• Common gotchas: High-lift blades increase engine load and reduce runtime slightly. Not ideal for standard mulching or if you mow very short, dry grass (may cause scalping).
• Balance check: Aftermarket blades sometimes arrive unbalanced. Always spin-test or balance them before installation to avoid vibration and spindle wear.

Should You Buy It

Buy these if you own a 42-inch Toro TimeCutter or Ex Mark Quest and frequently mow tall, thick, or damp grass where bagging or a clean lift is critical. They’re a cost-effective alternative to OEM high-lift blades, but skip them if you primarily mulch or mow short, dry lawns – standard or low-lift blades will perform better and use less power.