XT675 Carburetor for Kohler XT675 XT650 XT6.5 XT6.75 6.5HP 6.75HP 149CC Engine, Carb with Tune-Up Kit Replaces for 14 853 68-S 1485368S 14 853 68 1485368 14 853 55-S

What It Is

This is an aftermarket carburetor assembly with a tune-up kit (spark plug, air filter, fuel filter) designed to replace the OEM carb on Kohler XT-series engines (XT675, XT650, XT6.5, XT6.75, 149cc). It’s for walk-behind mowers, tractors, and small equipment using 6.5–6.75 HP Kohler Courage or Command Pro engines.

Fitment & Compatibility

Before buying, confirm your engine’s model and spec number (e.g., XT675-1234) on the valve cover or shroud—not just the mower brand. This carb replaces OEM part numbers 14 853 68-S, 1485368S, 14 853 68, 1485368, and 14 853 55-S. Measure your carb’s mounting bolt spacing (typically 2.5" center-to-center) and inlet diameter (usually 5/16" or 3/8"). Check that your mower’s fuel line and throttle cable fit the carb’s ports (straight vs. angled fuel inlet). Does not fit older Kohler K-series or larger V-twin engines.

Key Things to Know

• Quality is adequate for the price – The carb body and gaskets are cast aluminum, but the emulsion tube and jets may be slightly less precise than OEM. Expect to adjust the idle mixture screw (1.5–2 turns out from lightly seated).
• Installation is moderate – You’ll need to remove the air filter housing, disconnect the fuel line and throttle linkage, and swap the old carb. The included tune-up kit parts (air filter, spark plug) are generic; the plug gap may need adjustment (0.030").
• Common gotcha – The carb often arrives with shipping debris in the fuel bowl. Clean it with compressed air or carb cleaner before installing. Also, the float level may be off; check that the float sits parallel to the carb body.
• Compatibility with ethanol fuel – The gaskets and seals handle E10, but avoid E15 or higher. Use a fuel stabilizer if storing for winter.

Should You Buy It

This is a solid budget fix if your OEM carb is leaking, clogged, or the diaphragm is shot, and you’re comfortable with basic carb adjustments. It’s not for pros needing exact OEM tolerances or for engines with heavy wear. For $25, it’s a low-risk try that works for most DIY mower repairs.