ALL-CARB Carburetor Replacement for Kohler SV590–SV620 & CV490–CV493 — 20 853 33-S Kit with Gaskets & Fuel Filter

ALL-CARB 20 853 33-S is a direct-fit replacement carburetor engineered to restore fuel delivery for Kohler SV590–SV620 and CV490–CV493 series engines and compatible Toro mower models.

If your small engine is running rough, stalling, or struggling to start, a worn or damaged carburetor is often the cause. The ALL-CARB 20 853 33-S offers an aftermarket replacement designed to match multiple Kohler part numbers and several Toro mower applications. It ships as a ready-to-install kit with gaskets, a fuel filter, and wiring to simplify swapping the old unit for the new one.

Will this carburetor fit my Kohler SV590, SV591, SV600 or SV601 engine?

The 20 853 33-S is manufactured to fit a wide range of Kohler SV and CV engines specified for 19–22 HP. It replaces several related part numbers, so cross-referencing your original carburetor number ensures compatibility. Check the engine model stamped on the shroud and compare it with the supported list before ordering.

• Compatible with Kohler models SV590, SV591, SV600, SV601, SV610, SV620 and CV490–CV493.
• Replaces factory part numbers including 20 853 01-S, 20 853 8-S, 20 853 02-S, and others.
• Intended for 19–22 HP engine configurations commonly used on lawn mowers and light equipment.

What comes in the package and what tools will I need?

The kit includes the carburetor plus two gaskets, a fuel filter and an electric wire to reconnect any sensors or solenoids. Basic hand tools will complete the swap: wrenches, screwdrivers and pliers are usually sufficient. Keep a clean workspace and a container to catch residual fuel when you remove the old part.

• Included: 1x carburetor, 2x gaskets, 1x fuel filter, 1x electric wire.
• Recommended tools: wrench set, screwdrivers, pliers, fuel catch container, gloves.
• Precaution: disconnect the battery and relieve fuel pressure before starting.

How should I install and align the replacement without damaging the engine?

Align the carburetor with the engine flange and tighten the mounting screws evenly to avoid warping the base. Do not overtighten fasteners; hand-start screws then torque to snug using a wrench. When attaching accessories like the fuel inlet or electrical connectors, observe direction and proper sealing to prevent leaks.

• Align mounting holes to the engine interface before fully tightening.
• Tighten screws evenly and avoid excessive force that can crack the flange.
• Ensure the sealing ring is seated in fuel fittings and electrical connections are secure.

How will this replacement affect engine performance and maintenance?

Installing a fresh carburetor can restore consistent fuel flow, smoother idling, and more reliable starting compared with a clogged or worn original. It also helps prevent fuel leaks and reduces the need for aftermarket adjustments when properly installed. Regular maintenance — clean fuel, a fresh filter, and periodic inspection — keeps the carburetor functioning longer.

• Improves fuel metering for steadier idle and better throttle response.
• New gaskets and filter reduce the chance of leaks and contamination.
• Periodic inspection and clean fuel extend service life.

Who is this for: The ALL-CARB 20 853 33-S kit is intended for homeowners, landscapers and small-equipment technicians who maintain Kohler-powered lawn mowers and equipment or who own Toro models that list this carburetor cross-reference. If your engine matches the listed Kohler part numbers or is exhibiting starting and idle issues caused by a failing carburetor, this kit provides the replacement parts and basic hardware needed to get the machine back into service without sourcing multiple components separately.