2 Pack 532134149 Mulching Blades with Hardware for YTH18542 YTA18542 YTH1842 YTH22V42 Replaces Craftsman 42 Inch Mower Blades 42 Inch Mower Blades 532138971 422719 138498

What It Is

This is a 2-pack of 42-inch mulching blades (OEM part 532134149) designed for Craftsman tractors, replacing factory blades and hardware to finely cut grass clippings for nutrient recycling.

Fitment & Compatibility

Before buying, confirm your mower deck is exactly 42 inches—measure blade tip to tip. These blades fit Craftsman models YTH18542, YTA18542, YTH1842, and YTH22V42, plus tractors using OEM part 532138971, 422719, or 138498. They are aftermarket replacements for Craftsman 42-inch decks with a center hole of 1 inch and a 5-point star drive. Check your current blade’s center hole shape; if it’s round or different, these won’t work. Verify your spindle shaft is 5/8 inch diameter—most Craftsman 42-inch decks use this.

Key Things to Know

• Quality: Aftermarket blades, not OEM Craftsman. Users report good durability for residential mowing, but steel may be slightly thinner than factory originals.
• Installation: Moderate difficulty. Requires a socket wrench and torque to 70-80 ft-lbs. Center bolt is reverse-threaded on some models—turn clockwise to loosen. Includes new hardware (bolts and washers), which is essential for safety.
• Gotchas: Mulching blades have a higher lift than standard blades; they may clog in wet grass or cause more vibration if deck is uneven. Balance blades before install—use a blade balancer to avoid wobble.
• Compatibility: Not for 46-inch or 50-inch decks. Double-check your model number on the mower’s serial plate—YTH prefix is key.

Should You Buy It

This is a solid budget pick for Craftsman 42-inch tractor owners who want mulching capability and don’t need OEM blades. It’s right for residential lawns under 2 acres, where fine clippings are preferred. Avoid if you have a commercial mower, need standard lift blades, or want exact OEM fit—buy genuine Craftsman parts instead.