TENGMUJX Flat Idler Pulley 116-2456 2-Pack for Exmark & Toro mowers — OEM Fit, Durable Bearing

The TENGMUJX flat idler pulley 2-pack (part 116-2456) is a direct-fit replacement designed to restore belt alignment and smooth operation on compatible Exmark and Toro commercial walk-behind and zero-turn mowers.

These pulleys are engineered to match OEM fitment for a long list of Exmark Quest, Pioneer and Radius series machines, and many Toro models (including part numbers in the 74000–78472 range). Sold as a two-piece set, they let you replace worn or noisy idlers quickly—without specialty tools—so your deck belts track correctly and run with less vibration. Constructed from durable materials and quality-controlled by the manufacturer, the TENGMUJX pulleys aim to deliver reliable service at an economical price.

How will these pulleys affect mower belt performance?

Replacing a worn idler pulley reduces belt slippage, cutting noise and preventing premature belt wear. A true-fit pulley keeps the belt centered on the deck and spindle pulleys so power transfers efficiently from the engine to the blades.

• Reduces belt vibration and squeal for smoother cutting
• Maintains proper belt tension and tracking to extend belt life
• Prevents unexpected belt failures that interrupt mowing

Which machines and part numbers are compatible with this 2-pack?

The TENGMUJX idler matches Toro part 116-2456 and Exmark 116-2456 and fits multiple Exmark Quest (P/E/S), Pioneer (E/S), Radius (E/S) models. It also fits a wide range of Toro numbers listed in the product specs for many commercial decks.

• Direct replacement for Toro 116-2456 and Exmark 116-2456
• Compatible with Exmark Quest, Pioneer and Radius series decks
• Fits many Toro models including numbers in the 74000–78472 ranges

How difficult is installation and what tools are required?

Installation is straightforward for a home mechanic with basic hand tools. Most replacements only require removing the old idler, swapping in the new pulley, and re-tensioning the belt—no specialized equipment is necessary.

• Fits standard wrench and socket sets used on most mower decks
• Can be completed in minutes with the belt properly supported
• Manufacturer guidance available for questions or fit confirmation

What are the build quality and expected advantages over a worn pulley?

TENGMUJX uses quality control protocols and durable materials to offer consistent replacement parts. New pulleys eliminate wobble and bearing play, restoring quieter operation and improved belt life.

• Engineered for dimensional accuracy to match OEM specifications
• Durable construction to resist wear, corrosion and misalignment
• Sold as a two-pack so both sides or two worn pulleys can be changed together

Who is this for: This 2-pack of TENGMUJX flat idler pulleys is for landscapers, equipment owners and DIY mechanics who maintain Exmark and Toro commercial or residential mowers and need an affordable, OEM-compatible replacement. If you own a Quest, Pioneer or Radius Exmark deck or any of the Toro models listed in the compatibility range and you hear belt noise, feel pulsing, or see poor belt tracking, this replacement set helps restore correct deck operation quickly and cost-effectively.