525509501 532181040 Mower Deck Gauge Wheel with Bracket Kit, 42" Deck Gauge Wheel Bracket Kit for Husqvarna AYP Poulan Tractors & Lawn Mowers GWN42B YTH18542 YTH22V42 YTH2042 YTH 22V42

What It Is

This is a complete gauge wheel and bracket kit (OEM part numbers 525509501 / 532181040) that supports the outer edge of a 42-inch mower deck. It prevents scalping on uneven turf and reduces deck wear by keeping the cutting height consistent across the mower’s width.

Fitment & Compatibility

Before buying, confirm three things:

• Deck size: Fits only 42-inch (107 cm) cutting decks. Will not work on 46-inch or 54-inch decks without modification.
• Brand/model: Designed for Husqvarna, AYP (American Yard Products), and Poulan Pro tractors. Common compatible models include GWN42B, YTH18542, YTH22V42, YTH2042, and YTH 22V42. Also fits some Craftsman, Murray, and Sears tractors built on AYP platforms.
• OEM vs aftermarket: This is an OEM Husqvarna kit. Aftermarket copies may have slightly different bracket hole spacing or wheel diameter—measure your existing bracket’s mounting hole center-to-center distance (typically 4.5 inches) and wheel axle diameter (usually 3/8 inch) before ordering.

Key Things to Know

• Quality: OEM-grade stamped steel bracket and solid rubber wheel. The wheel is not pneumatic—it’s a hard rubber tire on a plastic hub. It rolls smoothly but won’t absorb bumps like an air-filled tire.
• Installation difficulty: Easy. Requires two bolts (usually 3/8-inch or 5/16-inch, not included) and a wrench. No drilling or welding needed if your deck already has the mounting holes. If holes are missing, you’ll need to drill them—use a center punch and a 3/8-inch bit.
• Common gotchas: The bracket can rust if left exposed to moisture—apply a coat of paint or rust inhibitor before installing. The wheel may be slightly smaller than your old one (5-inch vs 6-inch on some decks), so check your current wheel diameter to maintain the same deck clearance.
• Fitment note: Works best on decks with a flat leading edge. If your deck has a curved or rolled lip, the bracket may not sit flush—you might need to add a spacer washer.

Should You Buy It

If you own a 42-inch Husqvarna, Poulan, or AYP tractor with a worn or missing gauge wheel, this kit is a direct, affordable replacement. It’s not for decks larger than 42 inches or for zero-turn mowers. For the price, it’s a solid OEM fix that restores scalping protection and extends deck life with minimal effort.