Idler Pulley Belt Pulley Wear Resistant Fit for Ariens Zoom 2350 1540 1640 1634 Fit for Gravely Mowers ZT XL 42 52 Pro-Turn 160 148 1540 Replace 07300101 039608 07312500 07312559-Durable and Quiet

What It Is

This is a replacement idler pulley for the belt drive system on Ariens Zoom and Gravely ZT XL/Pro-Turn zero-turn mowers. It keeps the deck belt tensioned and aligned, reducing vibration and noise during operation.

Fitment & Compatibility

• Direct fit for: Ariens Zoom 2350, 1540, 1640, 1634; Gravely ZT XL 42”, 52”; Pro-Turn 160, 148, 1540.
• Replaces OEM part numbers: 07300101, 039608, 07312500, 07312559.
• Check before buying: Measure the pulley diameter and shaft bore (typically 4” OD, 5/8” bore) to confirm match with your deck. Verify your mower’s deck size and model year—older Zoom or Pro-Turn variants may use a different pulley depth or bearing type.
• Compatibility note: This aftermarket pulley works for most 42” and 52” decks on listed models, but not for 60” or 72” decks. If your deck uses a flanged or double-groove pulley, this single-groove unit won’t fit.

Key Things to Know

• Durable construction: Steel pulley with sealed ball bearings runs quieter and resists wear better than plastic OEM pulleys.
• Easy installation: Bolt-on replacement—no special tools needed. Just remove the old pulley, transfer the spacer/washer (if present), and torque to 20-25 ft-lbs.
• Common gotcha: Check the bearing shield orientation—some users report the shield can rub if reversed. Install with the shield facing outward.
• Belt tension: After installing, verify belt tension and tracking. A worn belt or stretched spring may cause premature pulley wear.

Should You Buy It

Yes, if you own one of the listed Ariens or Gravely ZT mowers and want a quiet, long-lasting pulley that won’t crack like plastic OEM parts. At $15.99, it’s a solid value for a direct-fit upgrade—just confirm your deck size and model year first.