1685321-S Carburetor for Kohler 7000 Series Engines 22HP 23HP 24HP 25HP 26HP Lawn Mowers KT725 KT730 KT735 KT740 KT745 Carburetor Replace for 32 853 61-S with Air Filter

What It Is

This is an aftermarket carburetor assembly (part number 1685321-S) designed to replace the OEM 32 853 61-S on Kohler 7000 Series engines (22-26HP) found in many zero-turn mowers, lawn tractors, and commercial walk-behinds. It includes the carburetor, air filter, and gaskets.

Fitment & Compatibility

• Engine series: Kohler 7000 Series KT725, KT730, KT735, KT740, KT745 (22, 23, 24, 25, 26HP).
• OEM cross: Replaces Kohler 32 853 61-S, 32 853 62-S, and 1685321-S.
• Check your mower brand: Fits many John Deere, Cub Cadet, Husqvarna, Craftsman, Troy-Bilt, and Simplicity models with these engines. Verify your engine model number (stamped on valve cover or blower housing), not just mower brand.
• Physical check: Measure mounting bolt spacing (typically 60mm) and fuel line diameter (usually 1/4" or 5/16"). The included air filter may not match your housing – compare shapes.
• Note: Aftermarket part; may need minor jet adjustment for altitude (above 5,000 ft).

Key Things to Know

• Quality variance: Aftermarket carbs often work well but can have slightly different jetting or gasket thickness. Expect to clean out machining debris before install.
• Installation difficulty: Moderate (2/5). Requires removing old carb, swapping linkage, and setting idle mixture screw (usually 1.5 turns out as baseline). No special tools.
• Common gotcha: The fuel shutoff solenoid (if equipped on your OEM carb) may not be included or compatible – reuse your original if needed.
• Air filter compatibility: The included filter is a generic rectangular element. If your housing is a specific shape (e.g., Kohler dual-stage), reuse your old filter or buy separately.

Should You Buy It

Buy this if you need a budget-friendly, direct replacement for a failing Kohler 7000 Series carburetor and you’re comfortable with minor adjustments (idle mix, jet cleaning). It’s not for pros needing OEM precision, but for DIYers at $20, it’s a solid fix for surging, stalling, or hard-starting symptoms. Skip it if your engine has a specific altitude or emission-control carb (check model suffix).