D110 Carburetor for John Deere D105 D100 LA105 LA110 Craftsman T110 42-in 500CC Lawn Tractor, with 796031 Air filter

What It Is

This is an aftermarket carburetor designed for 500cc single-cylinder lawn tractor engines, commonly used in John Deere D100/D105/D110, LA100/LA105/LA110, and Craftsman T110 models with 42-inch decks. It includes a 796031-compatible air filter, replacing the original carburetor to restore engine performance if the old one is clogged, leaking, or causing hard starts.

Fitment & Compatibility

• Check your engine model – Fits Briggs & Stratton 500cc (31C707, 31P977, 33R877) and certain Kohler Courage 500cc engines. Verify your engine’s model number on the valve cover or shroud.
• Deck size – Listed for 42-inch decks, but the carburetor itself is engine-specific, not deck-specific. It will fit any 500cc engine regardless of deck size.
• OEM vs aftermarket – This is a generic replacement, not OEM John Deere (AM139118, AM142471) or Craftsman. It may need minor adjustments (float height, idle screw) to match your engine.
• Measurements – Check the carburetor mounting stud spacing (typically 2.5 inches center-to-center) and fuel inlet size (usually 5/16-inch hose). Compare to your old carb before ordering.

Key Things to Know

• Installation difficulty – Moderate. You’ll need to disconnect fuel line, throttle/governor linkage, and remove two bolts. Expect 30–60 minutes if you’re comfortable with basic tools.
• Air filter included – The 796031-style filter fits many Briggs engines, but double-check your air box shape—some models use a different filter.
• Quality variance – Aftermarket carburetors often have cheaper gaskets or jets. Reuse your original gaskets if they’re in good shape, and consider cleaning the new carb before installation.
• Common gotcha – The default float setting may be off, causing flooding or fuel starvation. Adjust the float tab so the float sits level when inverted.

Should You Buy It

If your mower is hard-starting, running rough, or leaking fuel and you’re on a budget, this is a solid value at $24. It’s best for DIYers willing to tweak a generic part—not a drop-in replacement. If you want zero hassle or have a complex linkage setup, spend more on an OEM carburetor.