Carburetor for Kohler 7000 Series 22HP 23HP 24HP 25HP 26HP Engine, Replace 1685321-S 3285361S 3285347S, Fits KT725 KT730 KT735 KT740 KT745 Lawn Mower with Gaskets

What It Is

This is an aftermarket carburetor assembly for Kohler 7000 Series engines (22HP–26HP), commonly used in residential and commercial zero-turn mowers, lawn tractors, and riders. It replaces OEM part numbers 1685321-S, 3285361S, and 3285347S.

Fitment & Compatibility

Before buying, verify your engine model (e.g., KT725, KT730, KT735, KT740, KT745) – the listing covers all these. Check your old carburetor’s OEM number (stamped on the side) to confirm it matches one of the three listed. This is a direct bolt-on replacement, but you must also confirm your mower’s fuel system type (gravity-fed vs. pump-fed) because this carburetor is designed for gravity-fed systems. Measure the mounting flange hole spacing (typically 2.5” center-to-center) and the inlet fitting diameter (usually 5/16”) to avoid mismatch. Does not include fuel line or filter – you’ll reuse yours.

Key Things to Know

• Quality variance: At $25.99, this is a budget aftermarket carb. Expect plastic/brass components that may not match OEM durability. Some units arrive with debris or rough internal surfaces – inspect and clean before install.
• Installation complexity: Moderate. You’ll need to remove the air filter housing, fuel line, and throttle linkage. The included gaskets are thin – use a small amount of gasket sealant on the manifold side to prevent vacuum leaks.
• Tuning required: After installation, you may need to adjust the idle mixture screw (typically 1.5–2 turns out from lightly seated) and the idle speed screw to prevent surging or stalling. Have a tachometer or listen for smooth idle.
• Common gotcha: The included gaskets may not align perfectly with your intake manifold – compare them to your old gasket before torquing down. Over-tightening can warp the carburetor body.

Should You Buy It

This carburetor is a viable budget fix if your original is clogged or warped and you’re comfortable with basic small-engine tuning. It’s not for commercial use or high-hour machines – expect shorter lifespan than OEM. Best for DIY homeowners with a single mower who want to save money over a $80+ Kohler carb. If you need reliability for daily cutting or a warranty, buy OEM.