14 853 68-S XT675 XT650 Carburetor for Kohler XT 675 6.5hp 6.75hp 149cc Engine for Toro 20371 20370 20377 20378 Lawn Mower Parts Air Filter Kits

What It Is

This is a complete carburetor assembly with pre-installed air filter and fuel line kit, designed for Kohler XT675/XT650 149cc engines used on Toro 20371, 20370, 20377, and 20378 walk-behind mowers. It replaces the factory carburetor when yours is clogged, leaking, or won’t run.

Fitment & Compatibility

Before buying, confirm your engine model is Kohler XT675 (6.75hp) or XT650 (6.5hp) – the 149cc displacement is critical. Check your Toro deck model (20371, 20370, 20377, 20378) – these are typically 21-22" self-propelled mowers. The carburetor is aftermarket, not OEM Kohler, but uses the same bolt pattern and hose connections. Measure the mounting stud spacing (center-to-center) – should be 2.75 inches. Verify your existing fuel line inner diameter (1/4" or 5/16") matches the included kit. This carb will not fit older Kohler Command or Courage series engines.

Key Things to Know

• Quality is acceptable for the price – metal body feels solid, but plastic float may crack if overtightened. Keep the original gaskets if the kit’s are thin.
• Installation is straightforward – remove air filter housing, unbolt old carb, swap fuel line, and bolt on the new unit. Expect 20-30 minutes.
• Common gotcha – the included air filter may be slightly smaller than OEM; it works but check fitment before discarding your old filter housing.
• Adjusting the idle mixture screw – factory setting is usually 1.5 turns out from lightly seated; fine-tune after install if engine hunts or stalls.

Should You Buy It

If your Toro with a Kohler XT engine won’t start or runs poorly due to a gummed-up carb, this is a cheap, effective fix. It’s not OEM quality, but for $18 it’s worth trying before buying a $60+ Kohler part. Skip it if you want exact OEM fit or have a different engine series.