748-0376E Lawn Mower Blade Adapter Replaces MTD 748-0376 748-0376A 748-0376B 748-0376C, Fits MTD Craftsman Troy-Bilt Ryobi Yard Machines Bolens Yard Man Push Walk-Behind Mowers

What It Is

This blade adapter (748-0376E) connects the blade to the crankshaft on push and walk-behind mowers, allowing the blade to spin freely while engaging the engine. It’s designed for MTD, Craftsman, Troy-Bilt, Ryobi, Yard Machines, Bolens, and Yard Man models with a 7/8-inch or 1-inch crankshaft.

Fitment & Compatibility

• Measurement first: Measure your crankshaft diameter—this adapter fits both 7/8-inch and 1-inch shafts, but confirm by checking your mower’s manual or existing part.
• Deck size: Works with most 20–22-inch walk-behind decks, but not universal—verify your mower’s model number (e.g., 11A-XXX or 12A-XXX).
• OEM vs aftermarket: Replaces MTD 748-0376, 748-0376A, 748-0376B, 748-0376C. Aftermarket part, but dimensions match OEM specs.
• Check blade hole: The adapter’s center hole must align with your blade’s mounting hole—usually a 5/8-inch or 3/4-inch center hole.

Key Things to Know

• Quality: Solid steel construction, but some users report slight looseness on 1-inch shafts—tighten the bolt firmly to avoid wobble.
• Installation: Easy swap with a socket wrench and a 5/8-inch or 3/4-inch socket. No special tools needed.
• Common gotcha: The adapter has a keyway slot—ensure the crankshaft key is present and aligned, or the blade won’t spin correctly.
• Torque spec: Tighten the blade bolt to 30–40 ft-lbs (check your mower’s manual). Overtightening can strip the adapter threads.

Should You Buy It

If you need a direct replacement for a worn or damaged MTD-style blade adapter on a push mower, this is a solid, affordable choice. It fits most common models with 7/8-inch or 1-inch shafts, but double-check your crankshaft diameter and keyway before buying.