16-853-19S Carburetor Carb Replacement for Kohler 7000 Series Engine KT725 KT730 KT735 KT740 KT745 Engine with Gaskets Replaces 1685319S 3285363S 3285367S

What It Is

This is an aftermarket carburetor replacement for Kohler 7000 Series KT engines (KT725–KT745). It’s designed for riding mowers, zero-turns, and garden tractors that use these engines, restoring fuel delivery and idle performance when the original carb clogs or fails.

Fitment & Compatibility

• Engine models: Fits Kohler 7000 Series KT725, KT730, KT735, KT740, KT745 (check your engine model number stamped on the valve cover or shroud).
• OEM part numbers: Replaces 1685319S, 3285363S, 3285367S – confirm your old carb’s number matches one of these.
• Deck size/brand: Not deck-specific – any machine using these Kohler engines (e.g., Cub Cadet, John Deere, Husqvarna, Troy-Bilt) should work, but verify your engine model first.
• Measurements: The carb body and mounting flange are identical to OEM. Measure bolt spacing (≈2.5” center-to-center) and intake port diameter (≈1.25”) to be safe.
• Includes: Carburetor, gaskets, and sometimes fuel line adapters. Does not include a fuel filter or spark arrestor screen.

Key Things to Know

• Quality: Aftermarket – may need minor adjustment (idle screw, float level) out of the box. Inspect gaskets for proper fit before installing.
• Installation difficulty: Moderate. Expect 30–60 minutes, including removing the air filter housing, fuel line, and throttle linkage. Keep track of linkage springs and clips.
• Common gotchas: The fuel bowl drain screw can be delicate – don’t overtighten. If the engine runs lean, check for a blocked main jet or debris in the float bowl. Reuse your original choke and throttle cables unless damaged.
• Warranty: Typically 30-day return – test immediately. No OEM support.

Should You Buy It

Buy this if you have a Kohler 7000 Series engine with a failed or gummed-up carb and want a low-cost fix. It’s a solid budget option for DIYers who are comfortable with basic carb adjustments. Skip it if you need a drop-in replacement with zero tuning or if your engine is still under warranty – stick with OEM then.