14 853 36-S Carburetor for Kohler XT650 XT675 XT149 14 853 49-S 520-706 Engine, for Toro Lawn Mower 14-089-14-S Spring 14-089-44-S Spring with 14 083 15-S Air Filter Tune Up Kit

What It Is

This is a complete carburetor replacement and tune-up kit for Kohler Courage XT-series engines (XT650, XT675, XT149) and the Toro 14-089-14-S/14-089-44-S spring assembly. It includes the carburetor, two springs, and an air filter, designed for walk-behind mowers and small tractors with 149cc to 173cc single-cylinder engines.

Fitment & Compatibility

Check your engine model number – fits Kohler XT650, XT675, XT149, and Toro 520-706 engines. The carburetor replaces OEM part numbers 14-853-36-S and 14-853-49-S. Also fits Toro mowers using spring part 14-089-14-S or 14-089-44-S. Not compatible with larger Kohler Command or Courage Pro engines. Measure your carburetor mounting bolt spacing (center-to-center) – should be 60mm. Verify air filter housing dimensions match the included 14-083-15-S filter (approx. 5.5" x 3.5"). If your mower uses a different fuel bowl gasket or float valve, you may need to transfer those from the old carb.

Key Things to Know

• Quality is aftermarket, not OEM Kohler – works fine for most, but some users report slightly leaner fuel mixture. Check for plastic fuel bowl vs. metal; if plastic, it may crack if overtightened.
• Installation difficulty: moderate – requires removing the old carb, swapping the springs, and adjusting the throttle/governor linkage. Expect 30-60 minutes.
• Common gotcha: the included air filter may not seat perfectly in all Toro air boxes. Test fit before reassembling the cover.
• Springs included – these replace the return springs on the carburetor throttle plate. If your old springs are intact, you may not need them, but they’re cheap insurance.

Should You Buy It

Buy this if you need a budget-friendly carb replacement for a Kohler XT-series Toro mower that’s surging, stalling, or hard-starting due to a gummed-up carburetor. It’s a solid value at $20 for a complete tune-up kit, but skip it if you want OEM reliability for heavy commercial use or if your engine has a different carb mounting pattern.