AIVWUMOT Idler Pulley 120-7082 Compatible with Exmark Toro Commercial TimeMaster TurfMaster S X Series Walk Behinds 30" 20199 20200 20975

What It Is

This is a replacement idler pulley (part number 120-7082) for the belt tensioning system on select Toro and Exmark commercial walk-behind mowers. It keeps the drive or deck belt taut, preventing slippage and ensuring consistent blade or drive engagement.

Fitment & Compatibility

• Check your mower’s model number – This pulley is designed for Toro TimeMaster, TurfMaster, and S/X Series walk-behinds with 30-inch decks. Also fits Exmark commercial units using the same pulley.
• OEM cross-reference – Replaces OEM part 120-7082. Verify your old pulley’s part number matches.
• Measurements – Confirm pulley diameter (approx. 3.5 inches) and shaft bore size (typically 5/8-inch). Mismatched bore will not install.
• Deck size – Only for 30-inch deck models (e.g., Toro 20199, 20200, 20975). Not for 32-inch or wider decks.
• Belt type – Works with standard A-section or 5/8-inch wide belts. If your belt is narrower or wider, this pulley won’t fit.

Key Things to Know

• Quality vs. OEM – This aftermarket pulley is made of stamped steel with a sealed bearing. It’s durable for homeowner and light commercial use, but may not last as long as the OEM Toro part under heavy daily commercial cutting.
• Installation difficulty – Easy to moderate. Requires removing the belt, unbolting the old pulley (usually a single bolt), and reinstalling. No special tools needed beyond a socket set.
• Common gotcha – The bearing is sealed and non-serviceable. If it starts to wobble or make noise, replace it immediately to avoid belt damage.
• Torque spec – Tighten the center bolt to 20-30 ft-lbs. Over-tightening can crush the bearing; under-tightening causes wobble and belt wear.

Should You Buy It

If you own a Toro TimeMaster, TurfMaster, or S/X Series 30-inch walk-behind and need a budget-friendly, drop-in replacement for a worn or noisy idler pulley, this is a solid value at $8.59. It’s not built for extreme commercial abuse, but for residential or light commercial use, it performs reliably. Just confirm your bore size and model number before ordering.