GANCO 134149 532134149 138971 138498 Mulching Blades Replacement Part for Husqvarna YTH18542 YTH1842 Poulan Pro Lawn Mower with 42" Deck (Pack of 2 Lawn Mower Blades)

What It Is

This is a set of two mulching blades designed to replace the OEM blades on Husqvarna and Poulan Pro riding mowers with a 42-inch cutting deck. They are intended for mulching grass clippings rather than side-discharge or bagging.

Fitment & Compatibility

Before buying, confirm your mower has a 42-inch deck and that the blade measurements match: 21.25 inches long, 2.75 inches wide, with a 1-inch center hole and a 0.75-inch offset. These blades are direct replacements for OEM part numbers 134149, 532134149, 138971, and 138498. Compatible models include Husqvarna YTH18542, YTH1842, and many Poulan Pro models with the same deck. Check your current blade’s part number or measure your blade to avoid fitment issues—some 42-inch decks use different blade shapes.

Key Things to Know

• Quality: Made from steel but thinner than OEM blades; may bend or dull faster on rocky or thick grass. Rated 4.2/5, but some users report shorter lifespan.
• Installation: Easy bolt-on replacement. Use a torque wrench to tighten the center bolt to 70–90 ft-lbs. Ensure the blade’s curved ends point upward toward the deck.
• Gotcha: These are mulching-only blades—they lack the lift for efficient bagging or side-discharge. If you frequently switch modes, consider a different blade.
• Balance: Out of the box, these may require balancing. Use a blade balancer to avoid vibration that can damage the spindle.

Should You Buy It

If you need an affordable, direct-fit mulching blade for a Husqvarna or Poulan Pro 42-inch deck and primarily mulch clippings, this set is a solid budget choice. For heavy-duty use or longer blade life, consider spending more on OEM or thicker aftermarket blades.