Idler Pulley for Exmark Toro Lazer Z Master 52" 60" 72" Deck 116-4667 633109 1-633109 AC AS ASX XP XS HP LC Lawn Mower (2 Pack)

What It Is

This is a replacement idler pulley (2-pack) for the belt drive system on Exmark and Toro Lazer Z zero-turn mowers. It keeps belt tension correct to prevent slipping or throwing the deck belt during heavy mowing.

Fitment & Compatibility

Before buying, verify your mower’s deck size (52", 60", or 72") and model series. This pulley fits Exmark Lazer Z AS, AC, ASX, XP, XS, HP, and LC models, plus Toro Lazer Z models with matching decks. The OEM part numbers are 116-4667, 633109, and 1-633109. Measure your pulley’s outer diameter (approx. 4.5") and bore size (typically 5/8" or 3/4") to confirm. If your mower uses a different spindle or belt width (1/2" vs 5/8"), this pulley won’t work. Cross-check your model’s parts diagram before ordering.

Key Things to Know

• Quality: These are aftermarket pulleys, not OEM Toro/Exmark. They use sealed ball bearings and steel construction, which matches OEM durability for most users. Some report slightly noisier operation after 50+ hours.
• Installation difficulty: Easy. Remove the old pulley (usually one bolt), install the new one, and retension the belt. No special tools needed, but a torque wrench helps (tighten to 20-25 ft-lbs).
• Gotcha: The 2-pack is cost-effective, but if only one pulley fails, you’ll have a spare. However, if your other pulley is worn, replace both at once to avoid uneven belt wear.
• Check bearing play: Before installing, spin the pulley by hand. It should rotate smoothly with no wobble or grinding. Return if defective.

Should You Buy It

If you need a reliable, budget-friendly replacement for a worn idler pulley on your Exmark or Toro Lazer Z, this 2-pack is a smart choice. It matches OEM specs at a lower price and works for DIY repairs. Avoid if you require exact OEM parts for warranty or commercial use where zero noise tolerance is needed.