3-Pack Deck Extension Spring (932-0384/732-0384) – Heavy-Duty Replacement for M-T-D, Yard Machines, Huskee & More

What It Is

This is a 3-pack of heavy-duty deck extension springs designed to replace the OEM part numbers 932-0384 and 732-0384. They are used on lawn tractors and zero-turn mowers to tension the mower deck belt and maintain proper blade engagement, particularly on models from M-T-D, Yard Machines, Huskee, and similar brands.

Fitment & Compatibility

Before buying, check these three things:

1. Measure the spring – The original spring should be roughly 3–4 inches long when unloaded, with a coil diameter of about 0.5 inches. If yours is significantly different, this pack won’t fit.
2. Cross-reference OEM numbers – Confirm your mower’s manual lists 932-0384 or 732-0384 as the original part. These springs are aftermarket replacements, not OEM, but are made to match those specs.
3. Check deck size and model – Common on 42–54 inch decks from M-T-D, Yard Machines, Huskee, and some Troy-Bilt and Craftsman models. Not universal—avoid buying if your mower uses a different spring type (e.g., short, stiff springs for smaller decks).

Key Things to Know

• Quality vs OEM – These are heavy-duty aftermarket springs. They may be slightly stiffer than OEM, which can improve belt tension but might also increase wear on the idler pulley over time.
• Installation difficulty – Easy for most DIYers. You’ll need a pair of pliers to hook the spring onto the deck bracket and belt tensioner arm. No special tools required.
• Common gotcha – The spring ends (hooks) may be slightly longer or shorter than the original. If they’re too long, the belt may be too tight; if too short, it may slip. Test fit before finalizing.
• Pack of 3 – You only need one spring per deck. The extra two are spares or for multi-blade decks that use multiple springs (rare). Don’t install all three on one deck.

Should You Buy It

Buy this if you need a quick, affordable replacement for a broken or stretched deck extension spring on a M-T-D, Yard Machines, or Huskee mower with a 42–54 inch deck. It’s a solid value at $7.99 for three springs, and the heavy-duty build handles typical residential use. Skip it if you need an exact OEM match for a warranty or commercial mower, or if your original spring is a different size.