2 Pack 108-3766-03 Blade Support Replacement for Toro 20-22 Inch Mower | Compatible with 10603, 10730, 10739, 20003, 20016 Recycler Lawn Mower Model

What It Is

This is a 2-pack of blade support brackets (OEM part 108-3766-03) that secure the mower blade to the crankshaft on Toro 20-22 inch Recycler lawn mowers. It replaces worn or bent supports that cause blade wobble or vibration.

Fitment & Compatibility

Check your deck size – this fits Toro 20-inch and 22-inch Recycler decks only, not 19-inch or larger commercial models.
Confirm your model number – compatible with Toro models 10603, 10730, 10739, 20003, and 20016. Look for the model number on a sticker under the seat or on the deck.
OEM vs aftermarket – this is an aftermarket replacement (not Genuine Toro), but uses the same dimensions as OEM.
Measure the center hole – the blade support must fit over a 1-inch diameter crankshaft. If your shaft is larger (e.g., 1-1/8"), this won’t work.
Check blade bolt size – uses a 5/16-24 threaded bolt (included in some packs; verify if yours has one).

Key Things to Know

• Quality – Made from stamped steel; should last 2-3 seasons under normal use. Not as thick as OEM, but adequate for residential mowing.
• Installation difficulty – Easy (15 minutes). Requires a socket wrench and torque wrench (recommended 40-50 ft-lbs). Use thread locker on the bolt.
• Common gotcha – The two supports are identical, but only one is needed per mower. Keep the spare for future replacement.
• Watch for bent crankshafts – If your old support was badly bent, check the crankshaft for runout before installing the new one.

Should You Buy It

If you own a compatible Toro Recycler model and your blade support is warped, cracked, or causing vibration, this 2-pack is a cost-effective fix. It’s not for commercial use or non-Recycler decks, but for residential owners, it’s a solid value that saves buying a single OEM part.