Craftsman Lawn Mower Part # 424752 BLADE.42SP"3

What It Is

The Craftsman 424752 is a 42-inch, 3-in-1 mulching/blade set designed for select Craftsman lawn tractors. It cuts, mulches, and bags grass clippings, making it suitable for medium to large residential lawns.

Fitment & Compatibility

Before buying, verify your mower’s deck size is exactly 42 inches (not 42.5 or 40). This blade fits Craftsman models with 42-inch decks, including the 917 series (e.g., 917.270610, 917.28931). It’s an OEM replacement, so it matches original specs directly. Measure your old blade’s length (42 inches end-to-end) and center hole diameter (1 inch). Check your model number on the mower’s frame or under the seat—cross-reference with Craftsman’s online fitment tool or your owner’s manual. It will not fit 38-inch or 46-inch decks.

Key Things to Know

• Quality: OEM blade, heat-treated steel—holds edge longer than many aftermarket options. Expect 25-35 hours of use before sharpening.
• Installation: Moderate difficulty. Requires a socket wrench (usually 5/8-inch or 3/4-inch) and a blade removal tool or block of wood to prevent spinning. Always disconnect the spark plug first.
• Common gotcha: The blade is sold as a single, not a set. You need two for most 42-inch decks (one per spindle). Check your mower’s spindle count—most use two, but some three-spindle models exist.
• Mulching vs. bagging: Works best for mulching; for bagging, consider a dedicated bagging blade (like Craftsman 424753) for finer clippings.

Should You Buy It

Yes, if you own a compatible Craftsman 42-inch lawn tractor and want a reliable, OEM-grade blade that balances cutting, mulching, and bagging. It’s a solid choice for residential use, but if you primarily bag, look for a bagging-specific blade. For the price, it’s a durable upgrade over generic aftermarket blades.