173921 53217392 Mulching Blades Fit for 48 inch Husqvarna YTH2348 YTH2148 YTH2448 YTH1848XP GTH2548 Craftsman Poulan 48 Riding Mower Deck(3 Pack)

What It Is

This is a 3-pack of aftermarket mulching blades (part 173921 / 53217392) designed for 48-inch cutting decks on select Husqvarna, Craftsman, and Poulan riding mowers. They replace OEM blades to improve grass chopping and nutrient recycling, leaving finer clippings that decompose faster.

Fitment & Compatibility

Before buying, verify three things:

• Deck size: Fits only 48-inch decks (not 42" or 54"). Measure your deck’s cutting width if unsure.
• Model list: Confirmed for Husqvarna YTH2348, YTH2148, YTH2448, YTH1848XP, GTH2548; also fits Craftsman and Poulan 48" riders. Check your mower’s model number against seller’s list—non-listed models may still work if the deck is 48" and uses a 3-point mounting pattern.
• Measurements: Each blade is about 16.5" long, 2.5" wide, with a 1" center hole and 0.5" thickness. Measure your old blade’s length, center hole, and thickness to confirm match. These are aftermarket, not OEM, but match OEM part 53217392/173921.

What to check: Look at your current blade’s part number (stamped on blade) or your mower’s manual. If you have a 48" deck and the same mounting pattern, these likely fit.

Key Things to Know

• Quality: Steel is decent—heat-treated and coated for rust resistance. Not as thick or balanced as premium OEM blades, but fine for residential use.
• Installation: Direct replacement. Use a torque wrench (40-50 ft-lbs) and anti-seize on bolts. Sharp out of the box, but re-sharpen after 10-15 hours.
• Gotcha: Mulching blades require high lift and a covered deck to work well. If your mower has a side-discharge only, clippings may clump.
• Set of 3: Covers a 48" deck with 3 blades. One pack is enough for one mower.

Should You Buy It

Yes, if you have a 48" Husqvarna, Craftsman, or Poulan rider that uses 53217392 blades and you want a budget-friendly mulching upgrade for cleaner lawns. Skip if you need OEM exactness for a commercial mower or if your deck is a different size.