173921 173920 Gator Mulching Blades Compatible with Hus qvarna 48" Cut Deck 2748GLS YTH2148 YTH2348 YTH2448 YTH2748 Pou LAN Pro PB20VA48, Replace 180054 532173921 532180055 917532173921,3 Pack

What It Is

This is a 3-pack of Gator mulching blades designed for 48-inch cut decks on select Husqvarna, Poulan Pro, and other compatible lawn tractors. They replace OEM part numbers 180054, 532173921, 532180055, and 917532173921.

Fitment & Compatibility

Before buying, verify your mower has a 48-inch deck and a three-blade spindle configuration. Compatible models include Husqvarna YTH2148, YTH2348, YTH2448, YTH2748, and 2748GLS, plus Poulan Pro PB20VA48 and some Pro models. Measure your existing blade length—these are typically 18.5 inches long with a 1-inch center hole and 0.25-inch thickness. Cross-check your OEM part number (e.g., 532173921) against the list. Not for 42-inch or 54-inch decks, or single/dual-blade setups.

Key Things to Know

• Mulching performance: The Gator wave-style design cuts grass finer than standard blades, reducing clumping and bagging needs. Best for frequent mowing (no more than 1/3 of grass height).
• Installation: Easy bolt-on swap with a socket wrench. Use a torque wrench to tighten spindle bolts to 50-70 ft-lbs. No special tools required.
• Balance check: Aftermarket blades can be slightly heavier than OEM. Spin-test on a blade balancer before installing to avoid vibration.
• Durability: Made of heat-treated carbon steel. Harder than OEM but may dull faster on rocky or debris-heavy lawns.

Should You Buy It

Buy if you have a compatible 48-inch deck tractor and want better mulching performance at a lower cost than OEM blades. Skip if you need bagging or side-discharge blades—these are mulch-only. Best for homeowners mowing weekly on moderate lawns.