DONFON 285-544 Clutch Spring for Snapper Self-Propelled Mowers(2 Pack) | Compatible with Snapper Self-Propelled Mowers - Replaces 1-2122, 7012122, 7012122YP

What It Is

The DONFON 285-544 Clutch Spring is a replacement engagement spring for Snapper self-propelled mowers. It’s the part that pulls the drive belt taut to engage the wheels—without it, the mower won’t move under its own power. Sold as a 2-pack, it’s a direct fix for a mower that won’t self-propel or has a loose, slipping drive belt.

Fitment & Compatibility

Before buying, verify three things:

• Model series: Fits Snapper self-propelled mowers with a 285-544 style clutch spring. Commonly used on Snapper “Hi-Vac” and “Ninja” series with 21” or 22” steel decks (e.g., models 21675, 21765, 21766, 21768, 21769, 21770, 21771, 21772). Not for zero-turn or riding mowers.
• OEM cross-reference: Replaces Snapper part numbers 1-2122, 7012122, 7012122YP. If your mower uses a different spring (e.g., 285-545 or 285-546), this won’t fit.
• Physical check: The spring measures roughly 1.5” long with a 0.5” inner diameter and has hooked ends. Compare to your old spring—if yours is longer, shorter, or has different end hooks, it’s not compatible.

Key Things to Know

• Quality: Aftermarket spring, but reviews are strong (4.9/5). Users report it’s slightly stiffer than OEM, which can improve engagement feel—but won’t damage the system.
• Installation: Easy 10-minute job. You’ll need pliers to hook the spring onto the clutch arm and the frame tab. No special tools or disassembly required.
• Gotcha: If your mower still won’t self-propel after swapping the spring, the issue is likely a worn drive belt or a seized clutch pulley, not the spring itself. Check belt tension first.
• Pack size: Comes as a 2-pack. Keep the spare—these springs can snap without warning, and having a backup saves a trip to the store mid-season.

Should You Buy It

If your Snapper self-propelled mower has a loose, slipping, or non-engaging drive belt, and the spring is visibly stretched, broken, or rusted, this is a cheap, easy fix. The 2-pack gives you a spare for the price of a single OEM part. Skip it if your mower uses a different spring design (e.g., torsion spring) or if the drive system has other issues like a worn belt or bad pulley.