954-05078 Mower Belt Replacement for Cub Cadet/MTD/Troy-Bilt 754-05078 Compatible with Husqvarna 574845603, Exmark 1-413308, 413308 50'' Deck Lawn Mower Tractor Belt (5/8" x 143 1/4")

What It Is

This is a replacement drive belt for 50-inch cutting deck lawn tractors, transferring power from the engine pulley to the blade spindles. It fits models from Cub Cadet, MTD, Troy-Bilt, Husqvarna, and Exmark.

Fitment & Compatibility

• Deck size: 50 inches (not 46" or 54").
• Measurements: 5/8" wide × 143 1/4" outside length (OEM spec: 754-05078).
• Brands confirmed: Cub Cadet, MTD, Troy-Bilt (use OEM part #754-05078); also fits Husqvarna #574845603 and Exmark #1-413308 / 413308.
• Before buying: Check your old belt’s part number (stamped on side) and measure length end-to-end. Verify your deck model number (e.g., 50A, 50M) – some 50" decks use a different belt if built before 2005.
• Aftermarket note: This is a non-OEM replacement; quality is generally good for residential use, but may vary slightly in rubber stiffness.

Key Things to Know

• Installation difficulty: Moderate – requires removing the deck or belt guards, routing around three spindles and two idler pulleys, and releasing tension with a spring tool. Tight spaces may need a socket wrench.
• Common gotcha: If the belt is slightly too long (e.g., 143.5" vs 143.25"), you’ll have slack and poor blade engagement. Measure your old belt or deck pulley distance to confirm 143.25" is correct.
• Durability: Residential use only – not designed for commercial mowing (daily heavy loads may cause premature wear or snapping).
• Replacement interval: Every 1–2 seasons or 100 hours of use, or if you see cracking, fraying, or slipping.

Should You Buy It

Buy this if you need an affordable, direct-fit belt for a 50" residential lawn tractor from Cub Cadet, MTD, Troy-Bilt, Husqvarna, or Exmark, and you can confirm your deck’s OEM part number or belt length. Skip it if you have a commercial mower, a different deck size, or want a premium OEM belt for extended life.