Carburetor Replacement for John Deere 108 102 105 115 D105 D110 L105 L107 L108 LA105 LA115 LA125 X120 X145 Lawn Tractor Tune-Up Kit 17.5HP 19.5HP 21HP Engine

What It Is

This is an aftermarket carburetor replacement and tune-up kit designed for multiple John Deere lawn tractors with 17.5HP, 19.5HP, or 21HP single-cylinder engines. It includes the carburetor, gaskets, fuel filter, and spark plug—everything needed for a basic fuel-system refresh on older or rough-running mowers.

Fitment & Compatibility

Crucial check: This kit fits John Deere models with Briggs & Stratton single-cylinder engines (typically 500cc–650cc) found on the listed 100-series, LA-series, and X-series tractors. It does not fit Kawasaki or Kohler engines.

Before buying:

• Confirm your engine model number (stamped on blower housing or valve cover). Common compatible engines: 31C707, 31P777, 33R877.
• Verify your mower deck size (30"–54" is fine—carburetor is engine-specific, not deck-specific).
• Measure the carburetor bolt spacing (center to center): must be 2.5" or 2.75" (this kit fits both).
• Check your existing carburetor style: this replaces the Nikkei or Walley type with integrated fuel bowl and solenoid (if present, you may need to swap the solenoid over).

OEM vs aftermarket: This is a direct-fit aftermarket replacement. OEM John Deere part numbers include AM130414, AM137353, or AM138222—cross-reference your original.

Key Things to Know

• Installation difficulty: Moderate. Requires removing the engine shroud, disconnecting fuel lines, and swapping gaskets. Expect 45–90 minutes if you’re handy.
• Quality variance: Some units may need the float height adjusted or the idle mixture screw tweaked (turn 1.5 turns out as starting point). A small amount of debris in the fuel passages is common—blow them out with compressed air before installing.
• Common gotcha: The included spark plug may not match your engine’s heat range—keep your old plug as backup. Also, the fuel filter included is generic; use it only if it matches your line diameter (1/4" or 5/16").
• No warranty support: At this price, you’re buying a consumable. If it’s defective, expect to replace rather than return.

Should You Buy It

This is a solid budget fix for a John Deere mower that won’t start, runs rough, or surges. It’s ideal for DIY owners comfortable with basic engine work who want to avoid a $80–100 OEM carb. Skip it if you need a perfect fit out of the box, want a warranty, or have a Kohler/Kawasaki engine—go OEM in those cases.