ALL-CARB Carburetor Replacement for Kohler CH18 CH20 CH640 24-853-32-S 18–20.5HP — Direct-Fit, Restores Starting & Idle

If your Kohler-powered mower or small engine is running rough, flooding, hard to start, or idling poorly, a worn or damaged carburetor is often the culprit. This ALL-CARB unit matches the 24 853 32-S / 2485335 factory references and is built to drop in and get your engine back to reliable operation. Before ordering, compare the pictured flange, throttle linkage and mounting pattern with your existing carb to ensure proper fit.

Will this carburetor fit my Kohler CH18 or CH20 engine?

This replacement is made to match the common specifications for Kohler part numbers 2485335, 2485335-S and the 24-853-32-S family used on CH18, CH20 and CH640 engines rated around 18–20.5 horsepower. Fitment depends on matching the mounting face, choke/throttle linkages and fuel inlet positions.

• Replaces OEM references: 24-853-35, 24-853-35-S, 24-853-32-S
• Compatible with Kohler 2485335 and 2485335-S models
• Designed for CH18, CH20 and CH640 engines (18–20.5HP)

How do I verify this is the correct part before buying?

Compare your current carburetor to the product pictures and measure mounting bolt spacing, throttle lever orientation, and fuel inlet thread direction. The product listing includes accessory images and details; ensure hose fittings and choke configuration match your equipment.

• Check bolt hole pattern and flange shape against photos
• Confirm throttle/choke arm positions align with your linkage
• Verify fuel inlet and bowl orientation before purchase

What improvements can I expect after installing this replacement?

Installing a correctly matched carburetor can restore consistent starting, smoother idle and steady throttle response by renewing worn jets, seals and passages. Results depend on proper installation and that no other engine components (ignition, air filter, fuel supply) are causing issues.

• Restores reliable fuel metering and cold/hot starts
• Reduces hesitation and unstable idling when fitted correctly
• Includes the accessories shown in the main product image for installation

Are installation tools or modifications required?

Most installations are straightforward with basic hand tools; no permanent modifications are expected when the carburetor truly matches your engine’s configuration. If linkages or hoses differ, minor adjustments or replacement of connectors may be necessary.

• Requires standard wrenches and screwdrivers for mounting
• May need replacement fuel lines or clamps to match fittings
• Compare parts and use gaskets if not supplied to avoid leaks

Who this is for: this ALL-CARB 24-853-32-S replacement is aimed at homeowners and small-engine technicians repairing lawn mowers, garden tractors and other equipment powered by Kohler CH18, CH20 or CH640 engines. It's suited for anyone who has identified the carburetor as the likely fault and needs an aftermarket unit that mirrors Kohler references 2485335 / 2485335-S. If you’re unsure about fitment, inspect your existing carburetor against the product photos or consult a mechanic to confirm compatibility before purchase.

Note: Always disconnect the battery and drain fuel or relieve fuel pressure before replacing a carburetor. This description is informational; refer to your equipment manual for torque specs and safety procedures.