Toro 108-3762-03 Super Recycler 21 Inch Blade

What It Is

The Toro 108-3762-03 is an OEM (Original Equipment Manufacturer) replacement blade designed specifically for Toro Super Recycler 21-inch walk-behind mowers. It creates a mulching action that finely chops grass clippings and returns them to the lawn as natural fertilizer.

Fitment & Compatibility

Before buying, confirm your mower has a 21-inch cutting deck and uses the Super Recycler system. This blade fits most Toro Super Recycler models from the mid-2000s onward, including the 20333, 20334, 20340, 20370, and 20371. It also fits some Toro Recycler and Personal Pace models with 21-inch decks, but not standard Recycler models with a 22-inch deck. Measure your existing blade: this is a 21-inch long, 3-hole blade with a center hole diameter of 1 inch and a thickness of 0.1875 inches. If your blade has a different hole pattern or length, it won’t fit. Always verify your mower’s model number on the underside of the deck or in the owner’s manual before ordering.

Key Things to Know

• OEM quality – This is a genuine Toro blade, not an aftermarket knockoff. It’s made from hardened steel and balanced for optimal mulching performance.
• Installation difficulty – Easy to swap with basic tools (a socket wrench and a block of wood to jam the blade). Torque the blade bolt to 70-90 ft-lbs – don’t overtighten or you’ll strip the threads.
• Common gotcha – The blade is directional: the “wing” on the blade must face up toward the deck when installed. Installing it upside down will ruin mulching and can damage the mower.
• Sharpness – It comes sharp out of the box but will dull after 10-15 hours of use. Sharpen or replace annually for best results.

Should You Buy It

Yes, if you own a Toro Super Recycler 21-inch mower and want a factory-perfect replacement that maintains the mulching system’s performance. It’s slightly more expensive than generic blades, but the fit, balance, and durability justify the price for anyone who wants reliable, hassle-free mulching. Skip it if you don’t need a mulching blade or have a different deck size.