Toro Genuine OEM 2-Pack Mulching Blades 131-4547-03 131454703 (Replaces 108-9764-03) for 22in / 55cm Recycler Lawn Mower Including Newer Units 21472 21465 21464 21462 21447 21445 21442 21378 (2)

What It Is

This is a genuine Toro OEM 2-pack of mulching blades (model 131-4547-03) designed for 22-inch / 55cm Recycler lawn mowers. They replace the older 108-9764-03 blades and are intended for fine-clipping mulching, not bagging or side discharge.

Fitment & Compatibility

Check before buying:

• Deck size: Only for 22-inch (55cm) decks. Measure your deck width—if it’s 21” or 24”, these won’t fit.
• Model numbers: Fits newer Toro Recycler models: 21472, 21465, 21464, 21462, 21447, 21445, 21442, 21378. Also compatible with older 22” Recyclers that used 108-9764-03.
• OEM vs aftermarket: This is genuine Toro, so no fitment guesswork. Aftermarket blades may vary in thickness or hole alignment.
• Measurements: Blade length is 22 inches, center hole diameter is 1-inch, and the blade offset is specific to Recycler decks. If your current blade has a different hole size or offset, these won’t mount correctly.

Quick check: Look under your deck—if the blade is stamped with 108-9764-03 or 131-4547-03, these are a direct swap. If not, measure length and hole before ordering.

Key Things to Know

• Mulching only: These blades have a higher lift and curved design to recut clippings. They won’t bag well—use dedicated bagging blades for that.
• Installation: Requires a socket wrench (usually 9/16” or 5/8”). Torque to 40-50 ft-lbs. Left-hand threads? No—standard right-hand on most Toro models, but double-check your spindle.
• Sharpness: They come sharp but not razor-edged. For best mulching, sharpen after every 25 hours of use or when you see uncut clippings.
• Common gotcha: Don’t mix with standard blades—using one mulching and one standard blade will cause imbalance and poor cut.

Should You Buy It

Buy these if you own a 22-inch Toro Recycler and want factory-fit mulching performance without aftermarket guesswork. They’re the right choice for fine, even clippings that disappear into the lawn. Skip them if you need bagging blades or have a different deck size.