Troy-bilt 742p05643 Lawn Mower Blade 21 Inches

Product Description

The TROY-BILT 742p05643 is a 21-inch replacement cutting blade designed for Troy-Bilt walk-behind lawn mowers with an S-mount configuration. This OEM-style blade mounts directly to the mower deck spindle and delivers a clean cut across a standard 21-inch cutting path. It is a direct service part intended for installation by lawn equipment technicians or experienced service professionals performing routine blade replacement or end-of-season maintenance.

This blade is suited for residential walk-behind mower applications where a 21-inch deck with S-mount spindle attachment is present. The S-mount designation refers to the blade's center hole and mounting geometry, which must match the spindle hub on the mower for safe and proper installation. It is a common replacement part in Troy-Bilt residential mower maintenance programs.

Key Features

• 21-inch blade length fits standard Troy-Bilt walk-behind mower decks
• S-mount center configuration for direct spindle compatibility
• OEM-style replacement for accurate fitment and cutting performance
• Designed for residential walk-behind lawn mower applications

Compatibility

Designed as an OEM-style replacement blade for Troy-Bilt walk-behind lawn mowers equipped with a 21-inch cutting deck and S-mount spindle. Verify spindle mount geometry before installation.

Installation Notes

Blade replacement should be performed by a qualified small-engine or outdoor power equipment technician. Always disconnect the spark plug wire before servicing the blade to prevent accidental engine startup. Use proper blade-holding tools to secure the spindle during removal and installation, and wear cut-resistant gloves when handling the blade. Follow the mower manufacturer's service documentation for torque and safety procedures.

Technical Specifications

• Blade Length: 21 inches
• Mount Type: S Mount

Standard Information

• Brand: TROY-BILT
• Manufacturer Part Number: 742p05643