SV600 SV470 20 853 33-S Carburetor for Kohler SV620 SV610 SV601 SV530 SV540 SV541 SV590 SV591 SV471 SV480 CV490 CV491 Courage 15HP 19 HP 20 HP 22HP Engine Lawn Mower Parts

What It Is

This is an aftermarket carburetor designed to replace the OEM Kohler part on single-cylinder Courage, Command, and SV series engines. It meters fuel and air into the engine for combustion and is intended for lawn tractors, zero-turn mowers, and other small equipment using these engines.

Fitment & Compatibility

• Engines: Fits Kohler SV470, SV471, SV480, SV530, SV540, SV541, SV590, SV591, SV600, SV601, SV610, SV620, CV490, CV491, and Courage 15–22 HP models.
• OEM Part Numbers: Replaces 20 853 33-S, 2085333S, 2085333, 2085332S, 2085332, 2485332S, 2485333S, 2485332, 2485333, 2485325S, 2485325.
• What to check before buying:
  • Confirm your engine model number (stamped on the valve cover or blower housing). This carburetor does NOT fit twin-cylinder or larger V-twin Kohler engines.
  • Verify the mounting flange pattern and throttle/choke linkage orientation. Measure the carburetor base gasket width (approx. 2.5 inches) to match your intake manifold.
  • Check if your engine uses a fixed-jet or adjustable-jet version. This carburetor is fixed-jet; if your original had an adjustable main jet, you may need to swap the jet assembly.
  • For lawn tractors, verify that the fuel line diameter (typically 1/4 inch) and bowl drain screw location clear your frame or deck.

Key Things to Know

• Quality: This is an aftermarket part, not OEM Kohler. Some users report a slightly leaner mixture out of the box; you may need to adjust the idle screw or clean internal passages if the engine stumbles.
• Installation difficulty: Moderate. You’ll need a socket set, screwdriver, and possibly a small pick for gasket removal. Plan 30–60 minutes.
• Common gotchas:
  • The included gaskets are thin; use a thin layer of gasket sealer or replace with OEM gaskets if you see air leaks.
  • The throttle linkage spring may not align perfectly with your original bracket. Reuse your old spring if possible.
  • If the engine runs rough or won’t idle, check the float bowl height (should be 0.045–0.050 inches) and verify the needle valve is not stuck.
• Return policy: Check the seller’s return window before ordering; some aftermarket carburetors arrive with debris in the fuel inlet.

Should You Buy It

This is a good budget fix for a Kohler single-cylinder engine that won’t start or runs poorly due to a clogged or damaged carburetor. If you’re comfortable with basic small-engine repairs and don’t mind tweaking the idle mixture, it’s a cost-effective alternative to a $60–$100 OEM part. For commercial use or if you want guaranteed fit and performance, stick with an OEM Kohler carburetor.