138971 Mower Blade for 42'' Deck, Compatible with C Raftsman LT2000 YT3000, H usqvarna YTH22V42 YTH18542 YTA18542 YTH1542XP, P oulan, A YP, Replace 134149, 138498, 532138971, 4-Pack

What It Is

This is a 4-pack of aftermarket 42-inch deck mower blades (part 138971) designed for residential lawn tractors. They replace OEM blades on C raft sman, Husqvarna, Poulan, and A YP models, suited for standard grass cutting on medium-sized lawns.

Fitment & Compatibility

Before buying, verify these three things:

1. Deck size: Only fits 42-inch cutting decks. Measure your deck width (blade tip to tip) if unsure.
2. Model check: Confirmed fit for C raft sman LT2000, YT3000 series; Husqvarna YTH22V42, YTH18542, YTA18542, YTH1542XP; Poulan and A YP models with 42" decks. Not for zero-turn or commercial mowers.
3. OEM cross-reference: Replaces 134149, 138498, and 532138971. Check your current blade’s part number (stamped on blade or in manual). Center hole is 5/8" round; blade length is 21-1/8" tip-to-tip. Measure your old blade to confirm.

If your mower is not listed, measure blade length, center hole diameter, and deck size. Aftermarket blades may vary slightly in thickness or shape—verify fitment before installation.

Key Things to Know

• Quality: 4.4-star rating from 81 reviews. Users report good durability for residential use, but some note blades may need balancing out of the box.
• Installation: Moderate difficulty. You’ll need a socket wrench, torque wrench (set to 70-90 ft-lbs), and blade removal tool. Always disconnect spark plug first.
• Gotchas: The 4-pack is cost-effective, but blades are identical—no high-lift or mulching design. Not for wet grass or heavy mulching. Replace in sets for balanced cutting.
• Lifespan: Expect 25-50 hours of cutting before sharpening or replacement, depending on turf conditions.

Should You Buy It

Buy if you have a compatible 42-inch tractor and want a budget-friendly 4-pack for regular mowing. Avoid if you need mulching blades, have a zero-turn, or prefer OEM-specific fitment—these are generic replacements that may require balancing.