Maxpower 561811B 2 Set of 3-N-1 Blades for Many 42 in. Cut John Deere Mowers, Replaces OEM #'s GX22151 and GY20850

What It Is

This Maxpower 561811B is a 2-pack of 42-inch 3-N-1 mulching, bagging, and side-discharge blades designed to replace OEM John Deere blades GX22151 and GY20850. It’s for standard residential John Deere mowers with a 42-inch cutting deck that accept these specific blade patterns.

Fitment & Compatibility

Before buying, confirm your John Deere model uses a 42-inch deck and accepts blades with a 3.5-inch center hole, 0.25-inch thickness, and 17-inch length (end to end). This set fits many 100, 200, 300, and X300 series tractors (e.g., L100, LA145, D130, X304). Cross-reference your OEM part number: it replaces GX22151 and GY20850, but not the GX20850 or GY22151. Measure your existing blade’s center hole and length—if it’s 3.25 inches or 16 inches, this won’t fit. Also check your deck’s spindle pattern (most John Deere 42-inch decks use a single-bolt center mount, but verify the bolt size is 5/8-inch).

Key Things to Know

• Quality: Heat-treated steel with a painted finish. Users report they’re comparable to OEM in durability, but some note the paint chips quickly—doesn’t affect cutting.
• Installation: Easy swap with a socket and torque wrench (recommended 70-90 ft-lbs). No special tools. Ensure blades are mounted with the cutting edge facing upward toward the deck.
• Common gotchas: These are 3-N-1 blades, so they work for mulching, bagging, and discharge, but they’re not optimized for heavy mulching in thick, wet grass. You may need to slow down or double-cut. Also, these don’t fit John Deere 42-inch decks on older models (pre-2000s) or those with a 4-inch center hole.
• Set includes: Two blades, not four. If your deck uses two blades, this is a full set. If it’s a three-blade deck, you’ll need another set.

Should You Buy It

Buy this if you have a common John Deere 42-inch mower from the 2000s or later and want a reliable, affordable replacement for OEM blades. It’s a solid value for the price, especially if you’re not doing heavy-duty commercial mowing. Skip it if you need a dedicated mulching blade for tough conditions or if your deck uses a different center hole size.