UP2WIN 126-9196 Flat Idler Pulley for Ex Mark 48" 52" 60" Lawn Mower Deck, 116-4668 Idler Pulley Compatible with Ex Mark Lazer Z Quest Turf Tracer to ro Z Master Series, Replace 103-8743 132-9425

What It Is

This is a flat idler pulley (OEM-style part #126-9196) that routes and tensions the mower deck belt on Ex Mark zero-turn mowers. It’s designed for 48", 52", and 60" deck models in the Lazer Z, Quest, Turf Tracer, and Z Master series.

Fitment & Compatibility

Check these before buying:

• Deck size: Fits 48", 52", and 60" decks only. Not for 36" or 72" decks.
• Model series: Ex Mark Lazer Z, Lazer Z X-Series, Quest, Turf Tracer, and Z Master. Also compatible with some Toro Z Master models.
• OEM part cross‑reference: Replaces Ex Mark 126-9196, 116-4668, 103-8743, and 132-9425.
• Physical specs: 4.5" outer diameter, 5/8" bore with a 1" bushing. Flat face (not grooved) – must match a flat pulley location on your deck. Measure your existing pulley’s OD and bore to confirm.
• Belt width: Designed for 1/2" or 5/8" wide belts – verify your deck belt width.

Key Things to Know

• Quality: UP2WIN is an aftermarket brand. At ~$23, it’s about half the price of OEM. Sealed ball bearings are included, but bearing life may be shorter than OEM.
• Installation: Simple bolt‑on – remove the old pulley’s center bolt, swap, and torque to 20–25 ft‑lbs. No special tools needed.
• Common gotcha: The flat face must be used as a flat idler (not a grooved tensioner). Installing it in a grooved pulley position will cause belt slip and rapid wear.
• Bearing noise: If you hear grinding after install, the bearing may be defective. Return it immediately – this is the most common failure point for budget pulleys.

Should You Buy It

Yes if you’re on a tight budget and need a quick replacement for a flat idler on an Ex Mark 48–60" deck. No if you want OEM longevity or need a grooved tensioner pulley – stick with the genuine Ex Mark part for heavy commercial use.