16-853-19S Carburetor Replacement for Kohler 7000 Series KT725 KT730 KT735 KT740 KT745 Lawn Mower Engine with Fuel Pump Gaskets Spark Plug Replace 32-853-63S 32-853-67S

What It Is

This is an aftermarket carburetor assembly designed to replace the OEM Kohler 32-853-63S and 32-853-67S units on 7000 Series KT725, KT730, KT735, KT740, and KT745 engines. It includes the carburetor, fuel pump, gaskets, and a spark plug, intended for residential zero-turn mowers, lawn tractors, and commercial walk-behinds using these engines.

Fitment & Compatibility

Before buying, verify your engine model number (e.g., KT725, KT745) stamped on the valve cover or engine shroud. This carburetor fits only the Kohler 7000 Series KT7xx engines—not older Courage or Command series. Check your original carburetor’s part number: if it’s 32-853-63S or 32-853-67S, this is a direct swap. Measure your carburetor mounting bolt spacing (typically 2.75 inches center-to-center) and fuel inlet orientation to confirm. This kit replaces the carburetor, fuel pump, and gaskets as a unit; you may need to reuse your original air filter and throttle linkage.

Key Things to Know

• Quality variance: Aftermarket carburetors can have inconsistent jetting or casting flaws. Inspect gaskets for flatness and check that the float moves freely before installation.
• Installation difficulty: Moderate—requires removing the engine shroud, disconnecting fuel lines, throttle cable, and linkage. Have a small screwdriver set and needle-nose pliers handy.
• Common gotcha: The included spark plug may not match OEM heat range. Replace with a proper Kohler or NGK plug (e.g., Champion RC12YC) for reliable starting.
• Tuning needed: After installation, you may need to adjust the idle mixture screw (typically 1.5-2 turns out) and check for fuel leaks at the pump gasket.

Should You Buy It

Buy this if you need a budget-friendly, complete carburetor replacement for a Kohler 7000 Series engine and are comfortable with basic small-engine mechanical work. It’s a good value for DIY repairs, but skip it if you want OEM reliability or if your engine has additional issues (e.g., worn valves or bad ignition coil). For the price, it’s a solid stopgap, not a long-term professional fix.