ALL-CARB Carburetor Replacement for Kohler CH18 CH20 CH640 — 24-853-32-S Direct-Fit 18–20.5HP Restore Fuel Delivery

ALL-CARB 24 853 32-S is a direct-fit carburetor replacement engineered to restore fuel delivery for Kohler CH18, CH20 and CH640 18–20.5 HP engines.

This aftermarket carburetor is built as a compatible substitute for Kohler part numbers 2485335, 2485335-S and the 24-853-32-S family, offering a practical replacement when the original unit is worn, clogged or leaking. It comes with the components shown in the main product image and is designed to match the mounting and porting of the specified Kohler engines; however, visual comparison with your existing carburetor is recommended before purchase to confirm fitment.

Will this carburetor fit my Kohler CH18 or CH20 engine?

Yes — this unit is manufactured to match the common specifications for Kohler CH18, CH20 and CH640 engines that use 18–20.5 HP powerheads. Fitment depends on exact model and configuration, so confirming part numbers and the carburetor shape on your engine prevents installation issues.

• Replaces Kohler numbers: 2485335, 2485335-S, 24-853-32-S
• Compatible with Kohler CH18, CH20, CH640 18–20.5 HP engines
• Compare mounting holes, throttle linkage and fuel inlet locations before ordering

How will swapping to this replacement carburetor affect engine performance?

Installing a properly matched replacement restores consistent fuel flow and throttle response similar to the original equipment when adjusted correctly. It does not alter engine output but can eliminate issues like hesitation, rough idling or hard starting caused by a faulty carburetor.

• Restores stable idling and improved throttle response
• Reduces fuel leakage or flooding from worn components
• Requires correct adjustment and installation for best results

What should I check before installing this carburetor?

Before installation, verify that the replacement matches your original unit’s bolt pattern, throttle linkage orientation and fuel inlet position. Also inspect fuel lines, gaskets and the mounting surface so you can replace any worn seals and avoid vacuum leaks.

• Match part shape, mounting holes and linkages visually
• Replace gaskets and inspect fuel lines for cracks
• Clean mounting surfaces to ensure an airtight seal

Does the product include all needed accessories for installation?

The listing shows all accessories in the primary image; typical kits include the carburetor assembly and hardware shown. Some installations may require additional gaskets or linkages specific to your mower model, so review the pictures and your engine’s needs before purchasing.

• Main picture displays included components and hardware
• Extra gaskets or adaptors may be necessary for some installations
• Professional installation recommended if you’re unsure about adjustments

Who is this for: This replacement carburetor from ALL-CARB is aimed at homeowners, landscapers and small-engine technicians who need a reliable, direct-fit substitute for Kohler 24-853-32-S / 2485335 series carburetors on CH18, CH20 and CH640 18–20.5 HP engines. It’s a practical choice when the factory carburetor is damaged, clogged or beyond economical repair and you want a cost-effective option that restores dependable fuel delivery. Remember to compare your existing carburetor to the product photos and verify compatibility with your engine model before buying.