754-04043 Lawn Mower RZT 50 Drive Belt 1/2" x 57 3/4" Made with Kevlar for Cub Cadet/MTD 754-04043A, 954-04043, 954-04043B, RZT42, ZT50, ZT-5000, ZT54, ZT-54, ZTL7000

What It Is

The 754-04043 is a Kevlar-reinforced drive belt (1/2" x 57 3/4") that transfers engine power to the deck spindles on Cub Cadet and MTD zero-turn mowers with 50-inch decks. It’s designed for residential-grade mowers in the RZT and ZT series.

Fitment & Compatibility

• Exact dimensions: 1/2-inch width, 57 3/4-inch outside length. Measure your old belt’s length (lay it flat, measure end-to-end) to confirm.
• Direct OEM replacements: 754-04043, 754-04043A, 954-04043, 954-04043B.
• Compatible models: Cub Cadet RZT 50, RZT42, ZT50, ZT-5000, ZT54, ZT-54, ZTL7000. Also fits select MTD-built zero-turns with 50-inch decks.
• Critical check: Verify your deck size (measure blade tip to blade tip). This belt fits 50-inch decks only. 42-inch or 54-inch decks use different belts.
• Brand note: This is a Cub Cadet OEM part, not aftermarket. Aftermarket belts (e.g., Oregon, Stens) may be cheaper but check length tolerance.

Key Things to Do

• Measure before buying: A stretched or broken belt can mislead you. Replace with the exact 57 3/4" length; too long slips, too short stresses pulleys.
• Kevlar construction: Adds durability against heat and fraying, but still requires proper tension. Over-tightening can damage spindle bearings.
• Installation: Moderate difficulty—requires removing the deck or belt cover, routing around idler pulleys, and using a wrench to release tension. Have a belt diagram or photo handy.
• Common gotcha: The belt may appear loose after a few hours; recheck tension after the first 2-3 mows (Kevlar stretches slightly during break-in).
• Warranty: OEM part often carries a 1-year warranty; keep your receipt and original packaging.

Should You Buy It

Buy this if you own a Cub Cadet or MTD zero-turn with a 50-inch deck and want a direct-fit, OEM-quality belt that won’t need replacing for 1-2 seasons under normal residential use. Skip it if you have a 42-inch or 54-inch deck, or if you’re on a tight budget—aftermarket belts can save $5-10 but may need more frequent adjustment.