Husqvarna Genuine 532173921 Mulching Blade for 48" Decks / 2748 GLS, GTH 2248, GTH 2548, GTH 2648, YTH 1848, YTH 2146, YTH 2148, YTH 2348, YTH 2448, YTH 2748 Riding Mowers

What It Is

This is a Husqvarna Genuine OEM mulching blade (part 532173921) designed to fit 48-inch cutting decks on select Husqvarna riding mowers, including the 2748 GLS, GTH 2248, GTH 2548, GTH 2648, YTH 1848, YTH 2146, YTH 2148, YTH 2348, YTH 2448, and YTH 2748 models. It replaces standard lift blades to finely chop clippings for nutrient recycling, ideal for mulching in medium-to-large lawns.

Fitment & Compatibility

• Deck size: Only fits 48-inch (122 cm) decks. Measure your deck width before ordering—any other size will not work.
• Model check: Confirmed for the listed GTH, YTH, and 2748 GLS series. Not compatible with Husqvarna ZTRs, Craftsman, or other brands unless deck pattern matches exactly (rare).
• OEM vs aftermarket: Genuine Husqvarna ensures exact hole spacing (center hole diameter ~0.75") and blade length (~20.5"). Aftermarket blades may require rebalancing or have different offsets.
• Measuring: Remove one existing blade and compare length, center hole, and offset angle. The 532173921 has a 3/4" center hole and 90-degree offset.

Key Things to Know

• Sharpness: Blade comes unsharpened. You’ll need to sharpen it before first use or expect poor mulching performance.
• Installation: Requires a torque wrench—tighten to 70-90 ft-lbs. Use a thread locker (Loctite) on the bolt to prevent loosening.
• Deck compatibility: Not interchangeable with 42" or 54" decks. Double-check your model number plate under the seat or in the manual.
• Mulching vs bagging: This blade is optimized for mulching only. If you switch between bagging and mulching, keep your original lift blades for bagging.

Should You Buy It

Buy this if you own one of the listed Husqvarna 48" deck mowers and want OEM-quality mulching performance with a guaranteed fit. It’s a solid choice for homeowners who mulch regularly and prefer factory parts over aftermarket unknowns. Skip it if you need a bagging or lift blade, or if your deck is a different size.