Craftsman 134149 Lawn Tractor Mulching Blade for 42-in Decks, 2-Pack, Genuine Original Equipment Manufacturer (OEM) Part

What It Is

This is a set of two genuine OEM mulching blades for Craftsman lawn tractors with 42-inch cutting decks. Designed to chop grass clippings into fine particles and return them to the lawn as natural fertilizer, they replace worn or damaged blades to restore cutting performance.

Fitment & Compatibility

• Deck size: Fits only 42-inch (107 cm) Craftsman tractor decks. Measure your deck width to confirm.
• Model compatibility: Works with most Craftsman models using a 42-inch deck, including LT1000, LT2000, LT3000, DLT2000, and many others. Check your mower’s model number against Craftsman part 134149.
• OEM vs aftermarket: This is a genuine Craftsman OEM part—identical to the blade originally installed. Aftermarket blades may vary in thickness, balance, or hole pattern.
• Measurements: Blade length is approximately 20.5 inches, with a center hole diameter of 1 inch and a 5-point star-shaped drive hole. Verify your existing blade matches these dimensions.

Key Things to Know

• Installation difficulty: Easy for most DIYers—requires a socket wrench and a block of wood to prevent blade spin. Torque blade bolts to 70-80 ft-lbs.
• Quality: OEM blades are typically thicker and better balanced than cheap aftermarket options, reducing vibration and wear on the spindle.
• Mulching vs bagging: These blades have a curved, high-lift design for mulching. If you switch between mulching and bagging, you may need a separate set of standard blades.
• Gotcha: Always replace blades in pairs to maintain balance. Never sharpen OEM mulching blades—they’re designed to be replaced when dull.

Should You Buy It

If you own a Craftsman 42-inch deck tractor and want a reliable, drop-in replacement that maintains factory cutting quality, this 2-pack is a solid value. It’s ideal for DIY owners who prefer OEM fit and finish over cheaper aftermarket alternatives. Avoid if you need bagging or standard lift blades.