CUB CADET 490-501-C005 Transmission Drive Belt SC300 SC500 Walk-Behind Mowers

What It Is

This is the OEM replacement transmission drive belt for Cub Cadet SC300 and SC500 series walk-behind mowers. It transfers power from the engine to the transmission, enabling forward motion.

Fitment & Compatibility

Double-check these before ordering:

• Model series: Works only with SC300 and SC500 models. Verify your exact model number (e.g., SC300HW, SC500HW) on the mower’s data plate.
• Deck size: Fits 21-inch and 30-inch decks on these series—no other deck sizes.
• OEM part: Cub Cadet 490-501-C005. Aftermarket equivalents may not match belt length or tension. Measure your old belt length (outside circumference) to confirm.
• Physical check: Belt is 3/8-inch wide, 92.5 inches long. Compare to your current belt before installing.

Key Things to Know

• Quality: OEM belt is built to spec—aftermarket belts often slip or wear faster on these transmissions.
• Installation difficulty: Moderate. You’ll need to remove the deck and belt cover, then route around two pulleys and a tensioner. A socket set and pry bar help.
• Common gotcha: The belt can snap if the tensioner spring is weak or the pulleys are rusty. Inspect and replace those while you’re in there.
• No universal fit: This belt won’t work on other Cub Cadet models or brands—stick to SC300/SC500.

Should You Buy It

If you own a Cub Cadet SC300 or SC500 and need a direct, reliable replacement, this OEM belt is the right choice. It’s priced fairly for the quality, and it’s easier than hunting for an aftermarket belt that might not fit. Skip it if your mower isn’t one of those specific models—you’ll waste time and money.