Ferilter Carburetor for Kohler 7000 Series KT725–KT745 (1685321-S) — Complete Replacement Kit with Filters & Spark Plug

Ferilter 1685321-S is a direct-fit replacement carburetor assembly designed for Kohler 7000 Series engines (KT725, KT730, KT735, KT740, KT745) to restore fuel delivery and running performance on lawn mowers and garden tractors.

If your Kohler 7000 Series engine is running rough, stalling, or hard to start, an aging or clogged carburetor is often the cause. This Ferilter 1685321-S unit ships as a complete kit with the carburetor plus essential installation parts—fuel line, shutoff valve, spark plug, fuel filters, gaskets, clamps and mounting screws—so you can replace the worn component and get back to mowing quickly. It is engineered to match the fit and fuel port layout of the original Kohler part numbers listed below.

Which Kohler engines and part numbers does this replace?

This carburetor is intended for Kohler 7000 Series engines identified as KT725, KT730, KT735, KT740 and KT745 and generally covers 22–26 horsepower variants. Compare your old carburetor visually and confirm part numbers before purchasing to ensure compatibility.

• Direct replaces: 1685321S and 1685321-S equivalents
• Also compatible with legacy numbers: 1605321S, 3285361, 3205347, 3205361, 3285347S
• Suitable for engines rated 22 hp, 23 hp, 24 hp, 25 hp, 26 hp

What’s included in the Ferilter carburetor kit and why it matters?

Rather than sending only the carburetor body, this kit arrives with the additional hardware and consumables needed for a clean installation and immediate operation. That reduces return trips for missing parts and helps ensure proper sealing and fuel flow after replacement.

• 1 complete carburetor (1685321-S specification)
• Fuel line and fuel shutoff valve for correct fuel routing
• Spark plug and two fuel filters to refresh ignition and filtration
• Air cleaner gasket, carburetor gasket, screw kit and 4 clamps for installation

How will installing this carburetor affect mower performance?

Installing a correct-fit carburetor restores consistent fuel metering, which improves starting, idle stability and throttle response without changing engine tuning. This part is a like-for-like replacement, so it returns the engine to its designed behavior when the original carburetor has degraded.

• Improves cold starting and reduces stalling under load
• Restores smooth idle and steadier RPM under throttle changes
• Helps prevent flooding and fuel leakage when gaskets and valves are new

How should I confirm fitment before ordering?

Check your engine model tag and the part number stamped on your original carburetor; visually compare mounting holes, throttle and choke linkages and fuel port locations with the product photos. If your engine model appears on the compatibility list and the mounting pattern matches, this kit is likely correct.

• Verify engine model: KT725, KT730, KT735, KT740, KT745
• Compare old carburetor to photos for bolt pattern and port placement
• Confirm horsepower rating (22–26 hp) and related Kohler part numbers

Who this is for: This Ferilter 1685321-S carburetor kit is aimed at DIY mechanics, lawn mower owners, small-engine repair shops and maintenance technicians who need a complete, ready-to-install replacement for Kohler 7000 Series engines. It’s best when you’ve confirmed model compatibility and want a single shipment that includes gaskets, filters and basic hardware to finish the job without extra parts runs.