xuyunming Fuel Tank Replacement for John Deere L100 Series – GY21876 Direct-Fit with Cap, High-Impact Plastic

The xuyunming GY21876 is a direct-fit replacement fuel tank and cap engineered to restore fuel containment and fitment for many John Deere L100-series and compatible lawn tractors.

If your tractor shows signs of fuel seepage, cracks, or a degraded tank, this OEM-style replacement is sized and routed to match the original equipment. Molded from high-impact plastic, the tank resists warping and reduces leak risk while using the same mounting points and fill location as factory units. It replaces part numbers GY21876, GY21102 and GY20894 and is not intended for models equipped with a 54-inch deck.

Will this tank fit my John Deere L100-series mower?

Compatibility covers a broad range of 100-series and related models. Confirm your tractor model against the listed fitment to ensure correct fit before ordering.

• Fits L100, L105, L107, L108, L110, L111, L118, L120, L130 models
• Replaces GY21876, GY21102, GY20894 part numbers
• Also compatible with many LA, D, X, Scotts and Sabre tractor variants listed in the product notes
• Not compatible with tractors that use a 54-inch deck — double-check deck size

What materials and durability can I expect?

This fuel tank is manufactured from reinforced, high-impact plastic designed to withstand outdoor conditions and the vibration common to riding lawns tractors. The material reduces the chance of cracks from temperature swings and everyday use.

• High-impact molded plastic construction for improved toughness
• Factory-style wall thickness and mounting points for original fit
• Resistant to warping and light impact compared with older brittle tanks
• Includes compatible fuel cap for a complete replacement assembly

How do I know when a fuel tank needs replacement?

Replace the tank if you notice fuel stains under the tractor, persistent gasoline odor, or visible cracks and soft spots in the tank body. A leaking tank can create both performance issues and safety concerns, so prompt replacement prevents further damage.

• Visible fuel dripping or pooling beneath the tractor
• Strong smell of gasoline after operation or while parked
• Cracks, bulges, or soft spots in the tank material
• Difficulty securing a tight seal with the existing cap

How straightforward is installation and what should I prepare?

Installation follows the original tank’s mounting and fuel line routing, making it suitable for most home mechanics with basic tools. Empty the old tank and relieve fuel pressure, then transfer lines and mounts to the new tank, verifying all connections for leaks before use.

• Tools needed: basic wrench set, screwdriver, fuel-safe drain container
• Drain fuel into an approved container before removing the old tank
• Transfer mounting hardware and fuel lines to the new tank per original layout
• Check for leaks and secure cap before returning the tractor to service

Who this is for: This replacement tank is intended for owners and small-fleet managers who operate John Deere 100-series and other compatible lawn tractors listed in the product notes. It suits DIY repairers who want an OEM-style fit and an upgraded plastic construction to stop leaks and restore normal fuel storage. If your tractor uses a 54-inch deck, choose a model-specific tank instead; otherwise this assembly offers a like-for-like repair to get your mower back to safe operation.