Deck Spindle 618-06989 918-06989 for MTD Craftsman Troy Bilt Bronco 46 inch T1600 T1900 with Blade 742-04244 942-04290 with103'' Belt 754-04219 954-04219 Rebuild Kit

What It Is

This is a complete deck spindle assembly (OEM part 618-06989 / 918-06989) for 46-inch MTD-built lawn tractors, including Craftsman T1600/T1900 and Troy-Bilt Bronco models. It supports the blade and houses the bearings that allow the blade to spin freely; the kit also includes a blade (742-04244 / 942-04290) and a 103-inch drive belt (754-04219 / 954-04219) for a full rebuild.

Fitment & Compatibility

Before buying, verify these three things:

• Deck size: Must be a 46-inch cutting deck. Measure deck width or check model tag.
• Spindle hole pattern: This spindle has a 3-bolt mounting pattern with 3.5-inch bolt circle. Measure your old spindle’s bolt spacing to confirm.
• OEM vs aftermarket: This is an OEM-style replacement for MTD/Craftsman/Troy-Bilt. It fits T1600, T1900, Bronco, and many other 46-inch MTD decks (e.g., models with 42-inch belts won’t work). The blade is 16.5 inches long with a 5-point star center hole (742-04244 / 942-04290). The belt is 103 inches long x 1/2 inch wide.

Key Things to Know

• Quality: Comes with sealed bearings and a steel housing; much more durable than plastic spindles on some budget decks. Expect longer life than generic replacements.
• Installation difficulty: Moderate. You’ll need a socket set, a jack or blocks to lift the mower, and a puller if the old spindle is seized. Plan 1–2 hours.
• Common gotcha: The blade bolt is left-hand threaded on some MTD spindles—check before forcing. Also, the belt routing may differ between deck models; take a photo before removing the old belt.
• Kit completeness: Includes spindle, blade, and belt—but no hardware (bolts, lock washers). Reuse or buy separately.

Should You Buy It

If your 46-inch Craftsman or Troy-Bilt is making grinding noises, vibrating, or cutting unevenly, this kit is a solid, all-in-one fix. It’s priced fairly for OEM-grade quality, and the high rating reflects reliability. Best for DIYers who want a straightforward rebuild without hunting for individual parts. Skip it if your deck is smaller than 46 inches or you only need a blade or belt alone.