16-853-19S Carburetor Carb Replacement for Kohler 7000 Series Engine KT725 KT730 KT735 KT740 KT745 Engine with Fuel Pump, Replaces 32-853-63S 32-853-67S

What It Is

This is an aftermarket carburetor assembly designed for Kohler 7000 Series KT engines (KT725, KT730, KT735, KT740, KT745). It includes a built-in fuel pump, making it a direct replacement for the OEM 32-853-63S and 32-853-67S units. It’s intended for riding mowers, zero-turns, and garden tractors using these engines.

Fitment & Compatibility

Before buying, verify your engine model number (stamped on the valve cover or blower housing). This carb fits Kohler KT725, KT730, KT735, KT740, and KT745 engines only—not older Courage or Command series. Check that your mower uses a side-draft carb with a fuel pump; if your engine has a separate pump, this won’t work. Measure your mounting bolt spacing (typically 2.5” center-to-center) and compare to the replacement. Also confirm your fuel line size (3/16” or 1/4”) matches the carb inlet. This is an aftermarket part, so paint color, gasket thickness, or fuel bowl shape may differ slightly from OEM.

Key Things to Know

• Quality varies: Many users report it runs well out of the box, but some need a light cleaning or adjustment to the idle mixture screw (if adjustable). Expect minor burrs or debris in the bowl.
• Installation is moderate: You’ll need basic hand tools, a new gasket (often included), and careful routing of fuel lines and throttle/choke cables. Expect 30–60 minutes.
• Fuel pump integration: The built-in pump eliminates one external line, but ensure the pulse hose (from crankcase) is clean and connected tightly. A weak pulse will cause surging.
• Common gotcha: The carb may not match your air filter housing exactly—you might need to reuse your original mounting studs or spacers. Check clearance before tightening.

Should You Buy It

Buy this if you have a Kohler 7000 Series KT engine with a failing or clogged carburetor, and you want an affordable, drop-in replacement that includes the fuel pump. It’s a good value for DIYers comfortable with basic engine work, but if you need exact OEM fit and zero adjustments, spend more on a genuine Kohler part.