Grasscool 42 inch Mower Mulching Blades Replace Craftsman 134149 138971 for LT1000 LT2000 T110 42'' Deck Zero Turn Riding with 5-Star Mounting Pattern 532138971 138498

What It Is

This is a set of three 42-inch mulching blades designed to replace OEM Craftsman parts 134149 and 138971. They fit Craftsman LT1000, LT2000, T110, and select zero-turn riders with a 42-inch deck and a 5-star mounting pattern.

Fitment & Compatibility

Before buying, confirm your deck is exactly 42 inches wide—measure from blade tip to blade tip. Check your current blade’s mounting hole pattern: these use a 5-star (5-point) center hole, common on Craftsman and some Husqvarna/MTD decks. Verify your model number ends in a 42-inch deck variant (e.g., LT1000 with 42-inch deck). These are aftermarket, not OEM Craftsman, so they may differ slightly in thickness or balance. Measure your old blade length (should be ~21 inches per blade) and ensure the center hole diameter matches (typically 1 inch).

Key Things to Know

• Quality: Aftermarket steel, sharp out of the box, but may need balancing before first use. Some users report slightly shorter lifespan than OEM.
• Installation: Easy bolt-on job—remove old blades, torque to spec (usually 70-80 ft-lbs). Use a blade removal tool or block of wood to prevent spinning.
• Gotchas: The 5-star pattern is specific—won’t fit 4-point or oval-hole decks. Check that your deck uses three blades (not two). Mulching blades have more lift and curved edges; they won’t bag or discharge as well.
• Warranty: Typically 90-day replacement, not lifetime. Inspect for warping or dullness immediately.

Should You Buy It

Buy this if you need a budget-friendly, drop-in replacement for a 42-inch Craftsman deck with a 5-star pattern and prefer mulching over bagging. It’s a solid value for DIY maintenance, but if you demand OEM fit or longer blade life, stick with genuine Craftsman parts.