120-9470 30" Deck Traction Drive Belt for Toro TimeMaster Lawn Mower 20199 20200 20975 20976 20977 20978 (3/8" X27 1/2"

What It Is

This is the traction drive belt for the 30-inch deck on Toro TimeMaster lawn mowers. It transfers power from the engine to the transmission, enabling the self-propel function on models like 20199, 20200, 20975, 20976, 20977, and 20978.

Fitment & Compatibility

• Exact models: Toro TimeMaster 20199, 20200, 20975, 20976, 20977, 20978.
• Deck size: 30 inches only. Will not fit 22-inch or 42-inch decks.
• Measurements: 3/8-inch width x 27.5-inch length. Confirm your current belt matches these dimensions before ordering.
• OEM vs aftermarket: This is an OEM Toro belt (part 120-9470). Aftermarket alternatives may vary in durability and fit—stick with OEM for guaranteed compatibility.
• Check your mower’s serial number if you have an older or newer TimeMaster; some production changes may affect belt routing.

Key Things to Know

• Quality: OEM belt is reinforced for the high-torque demands of a 30-inch deck. Expect 1–2 seasons under normal use.
• Installation difficulty: Moderate. You’ll need to remove the deck belt, release the idler pulley tension, and route the new belt around the transmission pulley and idler. A belt diagram is helpful.
• Common gotcha: If the mower won’t engage or slips after replacement, check that the belt is seated in all pulley grooves and the idler arm moves freely. Bent pulleys can cause premature wear.
• Cost vs value: At $9.99, this is a budget-friendly OEM part. Cheaper aftermarket belts may save a few dollars but often wear faster.

Should You Buy It

If you own a 30-inch Toro TimeMaster and need a reliable traction drive belt, this OEM part is the right choice. It’s affordable, fits perfectly, and avoids the guesswork of aftermarket alternatives. Buy it if your current belt is stretched, cracked, or slipping—just confirm your mower’s model number matches first.