Toro Genuine OEM 4-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 (4)

What It Is

This is a 4-pack of Toro Genuine OEM mulching blades designed specifically for Toro 22-inch (55 cm) Recycler lawn mowers. They are intended for homeowners or operators who want optimal grass clipping recutting and fine mulching performance, particularly on newer Recycler models.

Fitment & Compatibility

Deck size: Only fits 22-inch (55 cm) Toro Recycler decks. Do not use on 21-inch or other sizes.

Model numbers confirmed: 21472, 21465, 21464, 21462, 21447, 21445, 21442, 21378 (and newer equivalents). Check your mower’s model number under the seat or on the deck sticker.

OEM vs aftermarket: Genuine Toro (OEM) ensures exact blade geometry, hole alignment, and balanced weight. Aftermarket blades may fit but can cause poor mulching or vibration.

Measurements: Blade length is exactly 22 inches, center hole diameter is 1 inch, and the drive pin hole pattern matches Toro’s Recycler spindle. Measure your current blade’s length and hole pattern before ordering.

Replaces: This part number (131-4547-03) supersedes the older 108-9764-03. If your mower originally used 108-9764-03, this set is a direct replacement.

Not compatible: With standard bagging or side-discharge blades—this is a mulching-specific design with a curved, high-lift profile.

Key Things to Know

• Installation difficulty: Easy—requires a socket wrench and torque to 35–40 ft-lbs. Use thread locker on the blade bolt if recommended in your manual.
• Mulching performance: These blades have a sharp, curved edge and a “sail” design that keeps clippings circulating for finer cutting. Expect better results on dry, not-wet grass.
• Common gotcha: Do not mix these with standard blades on the same spindle. Always replace all three blades (or all four on some models) at once to maintain balance.
• Durability: Genuine OEM steel is heat-treated and holds an edge longer than many aftermarket options, but still requires sharpening every 20–25 hours of use.

Should You Buy It

Buy this if you own a 22-inch Toro Recycler (especially a newer model) and want factory-spec mulching performance with no guesswork. It’s the right choice for users who prioritize even, fine clippings and don’t want to risk fitment issues with aftermarket blades. If your mower is an older 21-inch or a different brand, skip it.