42 in Lawn Mower Deck Spindle Rebuild Kit - Fits John Deere L100

In this review the author tested the 42 in Lawn Mower Deck Spindle Rebuild Kit as a budget-friendly option for owners of small John Deere lawn tractors. The bottom line: this kit is best for DIYers who need a direct, like-for-like replacement for worn spindle assemblies and the deck drive belt, because it includes two complete spindles and a 104 in belt so you can restore deck function without hunting for individual parts. The review focuses on fit, ease of installation, and practical issues customers reported.

Key Features

• Complete kit: Includes two spindle assemblies and one 104 in deck drive belt so a full 42 in deck rebuild can be done in one service session.
• Model compatibility: Designed to fit John Deere L100, L105, L107, L108, L110, L111 and L118 models for straightforward part replacement.
• Spindle cross-compatibility: Spindle assemblies match John Deere part references GY20050 and GY20785, simplifying parts lookup and installation.
• Belt size: The included belt is a 1/2 in x 104 in replacement compatible with the original GX20072 belt size used on 42 in decks.
• Warranty and returns: Manufacturer-backed 1 year warranty and a one-month return window reduce installation risk if parts are not satisfactory.

Who It's For

This kit is aimed at backyard mechanics and small-property owners who maintain John Deere L100-series tractors and prefer to handle deck repairs themselves. Because it bundles two spindles and the correct-length belt, it is especially useful when the mower shows wobbling blades, grinding noises from the spindle area, or has a cracked or stretched belt.

Those who should look elsewhere include users who need individual, OEM-branded fasteners or a full professional service - some buyers reported missing bolts and loose pulley fitment, so if you need factory-supplied hardware or want a shop installation package that includes new fasteners, plan to source those separately.

Pros & Cons

Pros

• Fits L100-series models and installs as a direct replacement for common spindle references, making the repair straightforward.
• Includes both spindles and the 104 in belt so the whole deck can be serviced without multiple orders.
• Generally praised for quality and value; many customers reported reliable performance after hours of use.
• One-year warranty and one-month return window provide extra reassurance for buyers.

Cons

• Several reports of missing bolts and loose spindle pulleys mean buyers may need to supply hardware or check pulley fit before final assembly.

Specifications

Kit contents	2 spindle assemblies + 1 deck drive belt
Compatible models	John Deere L100, L105, L107, L108, L110, L111, L118
Spindle part references	Compatible with GY20050 and GY20785
Belt size	1/2 in x 104 in (replacement for GX20072)
Deck fit	42 in deck
Warranty	1 year

Our Verdict

The 42 in Lawn Mower Deck Spindle Rebuild Kit is a practical, cost-effective choice for homeowners and DIY mechanics who need to restore a John Deere L100-series deck to working order. It offers clear value by supplying both spindles and the correct 104 in belt, though buyers should be prepared to provide missing bolts or address pulley fit if needed. Overall it is a sensible buy for those comfortable with basic mower repairs.

Frequently Asked Questions

Will this kit fit my L110?
Yes, the kit lists compatibility with John Deere L110 as well as other L100-series models.

Does the kit include installation hardware?
The kit includes spindle assemblies and the 104 in belt but some customers reported missing bolts, so buyers may need to source fasteners separately.

What is the warranty period?
The product carries a one-year warranty and offers a one-month return window if the spindle does not meet expectations.