138971 High Lift Blades for 42" Deck, 532138971 Mower Blades Compatible with Craftsman Hus-qvarna Pou LAN Lawn Tractor, Replaces 134149, 127843, 138498, 532127843, 532138498, 2 Pack

What It Is

This is a set of two high-lift mower blades designed for 42-inch cutting decks on lawn tractors. They create stronger upward airflow for better grass clipping discharge and bagging, ideal for thick or damp grass.

Fitment & Compatibility

• Deck size: Must be a 42-inch deck (measure cutting width or check deck model).
• Brands: Fits Craftsman, Husqvarna, Poulan, and other lawn tractors using a 3-point star center hole and 1-inch diameter arbor hole.
• OEM part numbers: Replaces Craftsman 138971, 134149, 127843, 138498, 532127843, 532138498.
• Check before buying: Measure blade length (~21 inches), center hole shape (star vs. oval), and verify your deck’s blade mounting pattern (some use two holes per blade).
• Aftermarket note: These are not OEM Craftsman; they are compatible replacements.

Key Things to Know

• Installation difficulty: Easy – requires a socket wrench and blade removal tool (or block wood to stop blade spin). Torque bolts to 70-90 ft-lbs.
• High lift vs. standard: These pull up more grass for better bagging but may bog the engine in very tall grass; don’t use if you primarily mulch.
• Balance check: Always balance blades after sharpening or replacement to avoid deck vibration.
• Common gotcha: Some users report they fit tighter on the spindle than OEM; lightly file the center hole if needed.

Should You Buy It

If you need replacement blades for a 42-inch deck and prioritize bagging or side discharge performance, these are a solid, budget-friendly choice. Avoid if you strictly mulch or have a low-horsepower tractor that struggles with high-lift blades.