Carburetor For Toro Recycler Model 20370 20371 149cc Lawn Mower Kohler 6.75 Motor Carb

What It Is

This is an aftermarket carburetor designed to replace the original on Toro Recycler mowers with the 149cc Kohler 6.75 ft-lb engine, specifically models 20370 and 20371. It mixes air and fuel for combustion; a failing carb causes hard starts, surging, or stalling.

Fitment & Compatibility

• Exact models: Toro Recycler 20370 and 20371 (check your model number under the seat or on the rear frame).
• Engine: Kohler 149cc, 6.75 ft-lb torque (not 6.5 or 7.0). Verify your engine’s model/spec numbers on the valve cover or blower housing.
• Deck size: Works with both 21” and 22” decks on these models—no deck-specific variation for the carb.
• OEM vs aftermarket: This is not a genuine Kohler or Toro part. It may need minor gasket trimming or jet adjustment for perfect fit. Measure your old carb’s mounting stud spacing (typically 40mm center-to-center) and compare to the new unit.
• What to check before buying: Confirm your mower uses a float-style carb (not a diaphragm). Also inspect the fuel line size—this carb uses a 1/4” ID line; if yours is different, you’ll need an adapter.

Key Things to Know

• Quality variance: Aftermarket carburetors can have inconsistent gasket thickness or slightly off jetting. Expect to clean out light debris or burrs before installation.
• Installation difficulty: Moderate. Requires removing the air filter housing, fuel line, and two bolts. No special tools beyond a socket set and needle-nose pliers. Plan 30–60 minutes.
• Common gotcha: The included gasket may be too thick or thin. Reuse your original gasket if the new one doesn’t seal. Also, prime the carb bowl with fuel before starting to avoid a dry crank.
• Tuning needed: You may need to adjust the idle mixture screw (turn 1.5 turns out as a baseline) to prevent surging. A small flathead screwdriver is required.

Should You Buy It

If your Toro 20370 or 20371 is hard-starting or stalling and you’ve ruled out stale gas and a dirty air filter, this $19 carb is a budget-friendly fix. It’s not OEM quality, but for DIYers willing to do a quick tune and possibly swap gaskets, it reliably restores function. Not ideal if you want drop-in perfection or have a different engine model.