13WM77KS011 Carburetor Compatible with Troy Bilt Pony 13AN77TG766 42" Riding Lawn Mower Tractor With Air Filter Part kit

What It Is

This is an aftermarket carburetor assembly with an air filter kit, designed to replace the OEM carburetor on Troy-Bilt Pony 42" riding mowers, specifically models like the 13AN77TG766. It delivers the correct fuel-air mixture to the engine and includes a new air filter, gaskets, and sometimes fuel line—ideal for fixing rough idle, stalling, or hard starting.

Fitment & Compatibility

• Primary fit: Troy-Bilt Pony 13AN77TG766 (42" deck) and other models using the 13WM77KS011 engine platform (often a Briggs & Stratton single-cylinder).
• Check your engine number: Look for a stamped code near the spark plug or valve cover—must be from the 13-series Briggs & Stratton family (e.g., 13A, 13B, 13C).
• Deck size: 42" only—won’t fit 46" or 50" decks without engine compatibility.
• OEM vs aftermarket: This is a non-OEM part; it may need minor adjustment of the idle mixture screw (if present) compared to OEM. Measure fuel line inner diameter (typically 1/4") to ensure the included line fits your tank and pump.
• Kit contents: Carburetor, air filter, gasket set, fuel line, and sometimes a spark plug—confirm you have all before starting.

Key Things to Know

• Quality is decent for the price – Expect a plastic choke linkage that may be slightly less durable than OEM, but it generally bolts on without modification.
• Installation difficulty: Moderate – you’ll need a 10mm socket, flathead screwdriver, and patience. Clean the mounting surface of old gasket residue.
• Common gotcha: The air filter housing may not perfectly align with older Troy-Bilt brackets—check for clearance before tightening.
• No manual included – Watch a YouTube video for your specific model; the idle mixture screw is often pre-set but may need a 1/4 turn out for smooth idle.

Should You Buy It

If your Troy-Bilt Pony 42" is stalling, hard to start, or running rough, this is a budget-friendly fix that works for most DIYers. It’s not a long-term OEM replacement, but for $28 it often solves the problem. Skip it if you want a guaranteed perfect fit or a premium rebuild—go OEM for that.