42 inch Deck Rebuild Kit - Fits John De ere 42" Scotts L100 L110 L118 L111 L108 L105 2 Spindles (GY20050) 2 Blades (GX20433) 1 Idler (GY22172) 1 Idler (GY22082) 1 Belt (GX20072) 2 Idler (GX20367)

What It Is

This is a complete 42-inch deck rebuild kit for select John Deere and Scotts lawn tractors, providing all the wear items needed to restore cutting performance: two spindles, two blades, one drive belt, and four idler pulleys.

Fitment & Compatibility

• Confirm deck size: Measure your mowing deck width – this kit fits only 42-inch decks, not 44" or 48".
• Check model: Fits John Deere L100, L105, L108, L110, L111, L118, and Scotts L2048, L2548, S1742, S2046, S2546. Verify your model number on the frame tag.
• OEM vs aftermarket: These are aftermarket replacements for OEM parts GY20050 (spindles), GX20433 (blades), GY22172 & GY22082 & GX20367 (idlers), and GX20072 (belt). Quality is generally good, but OEM may last longer on heavy-use machines.
• Measure spindle housing: Aftermarket spindles can have slightly different bearing cup depths – measure your old spindle housing depth (approx. 1.5"–1.75") to ensure the new ones seat fully.

Key Things to Know

• Installation difficulty: Moderate – requires basic tools (socket set, jack stands, possibly a puller for stubborn spindles). Plan 1–2 hours.
• Belt routing: The GX20072 belt is a cross-reference for the OEM part. Double-check routing diagram under the deck or in your manual – it’s easy to misroute and cause premature wear.
• Idler pulley nut torque: Idler pulleys (GY22172, GY22082, GX20367) need 20–25 ft-lbs. Over-tightening can warp the pulley or damage the bearing.
• Blade orientation: GX20433 blades have a specific offset. Install with the lift wing pointing up toward the deck – wrong side up reduces cutting quality and stresses the spindle.

Should You Buy It

If your 42-inch John Deere or Scotts deck is vibrating, cutting unevenly, or has worn spindles and a slipping belt, this kit is a cost-effective one-stop fix for a full deck overhaul. It’s best for DIYers comfortable with basic mechanical work and who want to avoid sourcing individual parts. Not ideal if you need OEM-only parts for warranty or commercial use.