134149 Mower Blades Fit for Craftsman Hu sqvarna Poulan Pro 42" Deck, 21" Mulching Blades for Craftsman LT2000 LT1000 YT4000, Hu sqvarna YTH18542 YT150, Replace 532134149 422719 424752

What It Is

This is a set of 21-inch mulching blades designed to fit 42-inch cutting decks on select Craftsman, Husqvarna, and Poulan Pro lawn tractors. They replace OEM part numbers 532134149, 422719, and 424752, and are intended for mulching grass clippings into fine particles to feed your lawn.

Fitment & Compatibility

Before buying, confirm your deck measures exactly 42 inches from spindle to spindle. These blades are 21 inches long and will not fit 38-inch or 46-inch decks. Check your mower’s model number against the manufacturer’s list: common fits include Craftsman LT2000, LT1000, YT4000; Husqvarna YTH18542, YT150; and Poulan Pro models with a 42-inch deck. Verify the center hole is 1-inch diameter and the blade offset matches your spindle (typically 0.75-inch). These are aftermarket blades, not OEM, so they may differ slightly in thickness or balance—always weigh them against your old blades before installation.

Key Things to Know

• Quality: Made from hardened steel, but some users report they dull faster than OEM blades—expect to sharpen or replace every 20–30 hours of mowing.
• Installation Difficulty: Moderate. You’ll need a socket wrench and a blade removal tool (or a block of wood to prevent spinning). Torque the center bolt to 40–55 ft-lbs; overtightening can strip the spindle.
• Common Gotchas: These are mulching blades, not standard lift blades—they have a curved design that may reduce bagging or side-discharge performance. If you frequently bag clippings, consider a different blade type.
• Balance Check: Always test balance after installation. An unbalanced blade causes vibration, uneven cut, and premature spindle wear.

Should You Buy It

Buy these if you own a Craftsman, Husqvarna, or Poulan Pro with a 42-inch deck and want an affordable mulching blade for regular lawn maintenance. They’re a solid budget option for homeowners who don’t mind slightly shorter lifespan than OEM and prefer a fine mulch over bagging. Avoid if you need high-durability blades for commercial use or if your deck requires a different blade length or hole pattern.