UP2WIN Idler Pulley 1-613098 Compatible with Ex Mark TR23KC FMD604 John Dee re Z710A Z720A Z910A Lawn Mower, 781856 Flat Idler Pulley Replaces Toro E613098 John Dee re TCA19779 TCA20092, 2 Pack

What It Is

This is a flat idler pulley (part number 1-613098) that guides and tensions the drive belt on zero-turn mowers. It’s designed for Ex Mark and John Deere commercial mowers, specifically models with 48-60” decks like the TR23KC, FMD604, Z710A, Z720A, and Z910A.

Fitment & Compatibility

• Check your deck size and model number – this pulley fits 48”, 54”, and 60” decks on the listed Ex Mark and John Deere models. Verify your mower’s model plate before ordering.
• OEM cross-references – Replaces Toro E613098, John Deere TCA19779, TCA20092, and Ex Mark 781856. Also fits some Toro Z-Master models with the same deck.
• Measure the pulley – Flat idler, 4.0” outer diameter, 3/4” bore. Confirm your belt width and center hole size match.
• Aftermarket vs OEM – This is a non-OEM replacement (UP2WIN brand). Quality is generally good for the price, but not identical to Toro/Deere factory parts.

Key Things to Know

• Installation is straightforward – Remove the old pulley and bolt, install the new one with the same bolt and washer. No special tools needed. Torque to 20-25 ft-lbs.
• Inspect the bearing – These pulleys use sealed bearings. Spin it by hand before installing; it should roll smoothly with no wobble or grinding.
• Common gotcha – The belt routing is critical on zero-turn decks. Mark or photograph the belt path before removing the old pulley to avoid re-routing errors.
• Two-pack value – You get two pulleys for ~$23. Good to have a spare, or replace both idlers at once if the other one is worn.

Should You Buy It

Yes, if you need a budget-friendly replacement for a worn flat idler on one of the listed Ex Mark, John Deere, or Toro zero-turn mowers. It’s a solid value for the price, but if you want factory-spec durability for heavy commercial use, consider the OEM part instead.