13WV78KS011 Carburetor for Troy Bilt Bronco 13WX79KT011 13AX60KH011 13BX60TG766 13AV60KG211 12AV60KG011 42'' Riding Lawn Mower with Kohler Courage 22Hp SV470 SV530 SV620 SV600S

What It Is

This is an aftermarket carburetor designed to replace the OEM unit on Troy-Bilt Bronco 42″ riding mowers powered by Kohler Courage series engines (SV470, SV530, SV620, SV600S). It controls the air-fuel mixture entering the engine; if your mower won’t start, runs rough, or stalls under load, a clogged or failed carburetor is often the cause.

Fitment & Compatibility

Before buying, confirm your mower’s model number (found on a sticker under the seat or on the frame) matches one of these: Troy-Bilt Bronco 13WX79KT011, 13AX60KH011, 13BX60TG766, 13AV60KG211, 12AV60KG011, or 13WV78KS011. Also verify your engine is a Kohler Courage 22hp SV470, SV530, SV620, or SV600S – check the engine shroud for the model decal. This carburetor is not compatible with Kohler Command or other engine families. Measure the mounting flange bolt spacing (typically 2.5″ center-to-center) and the fuel inlet diameter (usually 1/4″) to match your existing setup. It’s a direct replacement for OEM part numbers like Kohler 24 853 23-S or Troy-Bilt 751-11700, but always compare gaskets and mounting holes before installing.

Key Things to Know

• Quality variance: Aftermarket carburetors often use thinner gaskets or less precise jetting than OEM – you may need to adjust the idle mixture screw (turn 1.5 turns out as a starting point) or clean out debris from manufacturing.
• Installation difficulty: Moderate. You’ll need basic hand tools (socket set, screwdrivers) and about 30-60 minutes. Disconnect the battery, remove the air filter housing, and label fuel lines to avoid mix-ups.
• Common gotchas: The included gaskets may not seal perfectly – use a thin layer of gas-resistant sealant on the intake gasket. Also, the choke linkage often needs bending to align with the throttle cable; test movement before tightening bolts.
• Fuel system prep: If your old carb failed due to sediment or stale gas, flush the tank and replace the fuel filter and lines to prevent immediate re-clogging.

Should You Buy It

This is a budget-friendly fix for a non-starting or rough-running Troy-Bilt Bronco with a Kohler Courage engine – ideal if you’re comfortable with basic mechanical work and don’t want to spend $80+ on an OEM carburetor. Skip it if you need exact OEM fit without adjustments, or if your engine has internal damage (e.g., bent valves) that a carburetor swap won’t fix.