20 853 35-S Carburetor for Kohler SV600 SV590 SV530 SV610 SV620 SV540 20 HP 19 HP 18HP 18 HP 20HP 19HP 22HP 21HP Engines 2085335S KH-20-853-35-S 20-853-35-S 20 853 21-S 20 853 44-S

What It Is

This is an aftermarket carburetor replacement for Kohler Courage and Command Pro single-cylinder engines in the SV530–SV620 range (18–22 HP), commonly used on riding mowers, zero-turns, and garden tractors from brands like Cub Cadet, John Deere, Husqvarna, and Craftsman.

Fitment & Compatibility

• Engine models confirmed: Kohler SV530, SV540, SV590, SV600, SV610, SV620 (18–22 HP).
• OEM cross numbers: 20-853-35-S, KH-20-853-35-S, 20 853 21-S, 20 853 44-S.
• What to check first:
  • Measure your old carburetor’s mounting bolt spacing (typically 2.5" center-to-center on these engines).
  • Verify your engine’s model number is stamped on the valve cover or blower housing (e.g., SV600-1234).
  • This is an aftermarket part—may not include gaskets or fuel line fittings. Buy a separate gasket set (often sold as KH-24-853-22-S).
  • Does not fit Kohler CH, CV, or KT series engines.

Key Things to Know

• Quality variance: At $16, this is a low-cost aftermarket unit. Expect basic castings and non-adjustable main jets. Works fine for stock engines but may need slight float adjustment or a new bowl gasket out of the box.
• Installation difficulty: Moderate. You’ll need to remove the air filter housing, fuel line, and two bolts. Clean the intake manifold gasket surface and use a new gasket to prevent air leaks.
• Common gotchas:
  • The supplied gaskets are often too thin or poorly cut—reuse your old OEM gasket if it’s in good shape.
  • Some units arrive with the float stuck or the bowl screw loose. Open the bowl, check the float moves freely, and tighten the screw before mounting.
  • If your engine has a fuel solenoid, this carb does not include one—you’ll need to swap your old solenoid or cap the port.

Should You Buy It

Buy this if you have a Kohler SV-series engine with a failing or clogged carburetor and want a low-cost, direct-fit replacement for a stock engine on a riding mower or tractor. It’s a solid budget fix for DIYers who don’t mind minor tweaks (float check, gasket swap). Skip it if you need precise tuning, OEM reliability, or a carb with an integrated fuel solenoid—spend $40–60 on a higher-quality aftermarket or genuine Kohler unit instead.