Ferilter Carburetor for Kohler SV Series Engines — Direct-Fit Replacement for 15–22 HP Mowers (20-853-33-S Compatible)

Ferilter replacement carburetor engineered to fit Kohler Courage SV470–SV620 engines used on Cub Cadet, Toro, Troy-Bilt and other zero-turn and lawn tractors.

This carburetor is a direct-fit aftermarket replacement designed for a wide range of Kohler Courage and SV-series engines (SV470, SV480, SV530, SV540, SV590, SV600, SV600S, SV610, SV620). It replaces OEM part numbers such as 20-853-33-S and related 20-853 and 12-853 variants commonly found on 15–22 HP small engines. Before ordering, verify the part number and compare the shape and mounting points to your existing unit to ensure compatibility.

Which engine and mower models will this Ferilter carburetor work with?

This unit supports many Kohler Courage and SV-series engines from about 15 to 22 HP and is compatible with several mower makes and models. Typical fits include Cub Cadet LTX/LT/RZT series, Toro Z and LX series zero-turns, and other MTD-based or Troy-Bilt machines that use the same Kohler engines.

• Kohler engines: SV470, SV480, SV530, SV540, SV590, SV600, SV600S, SV610, SV620
• Mower brands: Cub Cadet, Toro, Troy-Bilt, Husqvarna, MTD, Bronco
• Common models: LTX1045, LT1042, RZT-42, Z4200, Z4220, Z5000, LX460/465
• OEM numbers it replaces: 20-853-33-S, 20-853-14-S, 20-853-16-S and similar

How do I confirm this carburetor is the right replacement for my mower?

Match the part visually and by part number: compare the mounting bolt pattern, throttle linkage, fuel inlet/outlet locations and float bowl orientation to your current carburetor. If the part numbers on your old carburetor match any of the OEM numbers referenced, it's likely compatible; when in doubt, remove the old unit and compare photos.

• Check for identical mounting holes and gasket surface
• Verify throttle and choke linkage geometry
• Compare float bowl position and fuel inlet location
• Confirm OEM part number from the old carburetor

What should I expect during installation and initial use?

Installation is generally straightforward for mechanically-inclined owners: remove the air cleaner, disconnect linkages and fuel line, unbolt the old carburetor, and reverse the process. After installation, run the engine and make basic idle and mixture adjustments as needed to restore smooth operation; small tuning tweaks are often required when switching aftermarket units.

• Tools needed: basic wrench set, screwdrivers, pliers
• Replace gaskets, inspect fuel lines and filters during swap
• Start and let warm up, then adjust idle speed and mixture
• If unsure, seek a small-engine technician to avoid damage

What does the package include and are there fitment cautions?

The package contains the carburetor and associated parts shown in the product photos; review those images and the part listing to make sure mounting hardware and linkages match your mower. Note that several similar Kohler carburetors exist—check your part number carefully and compare the physical shape to avoid ordering the wrong unit.

• Includes carburetor and pictured components
• Compare the product photos with your current carburetor
• Contact seller if you need confirmation before purchase
• Not covered: special configurations or modified throttle linkages

Who is this for: This Ferilter carburetor suits homeowners and landscapers who maintain Cub Cadet, Toro, Troy-Bilt and similar zero-turn or lawn tractors powered by Kohler Courage and SV-series engines between 15–22 HP. It's aimed at DIY mechanics looking for a cost-effective direct-replacement part, plus service shops that need a compatible aftermarket option — provided you confirm the part number and mounting details before installation.