Restore reliable starting and power to your Kohler CV490S engine with genuine OEM replacement parts from Repair Clinic. The CV490S is a 490 cc single-cylinder OHV four-stroke engine from Kohler’s CV series, commonly installed in walk-behind mowers and outdoor power equipment. The carburetor, air filter, spark plug, and ignition coil are the most frequently serviced components. Repair Clinic stocks genuine Kohler OEM parts for the CV490S including the Kohler carburetor parts, Kohler air filter parts, Kohler spark plug parts, and Kohler ignition coil parts. Browse the Kohler small engine parts catalog filtered by CV490S for the complete parts inventory.
Kohler CV490S: 490 cc Single-Cylinder OHV Engine Service
The Kohler CV490S is a 490 cc single-cylinder OHV four-stroke engine. Annual carburetor float bowl draining before winter storage prevents the varnish deposits that cause most CV490S hard-start and idle-surging complaints at the start of the mowing season. The small engine repair help section covers CV490S carburetor service and spark plug replacement.
Most Replaced Parts on the Kohler CV490S
Carburetor for the Kohler CV490S
Ethanol varnish during off-season storage is the leading cause of hard starting and idle surging on the CV490S. Cleaning restores function in most cases. When the diaphragm or float bowl gasket has hardened, carburetor replacement is the most reliable solution.
Air Filter for the CV490S
Replace the air filter at the start of each mowing season or every 25 hours. A clogged filter causes the engine to run rich and lose power under load.
Spark Plug for the Kohler CV490S
Annual spark plug replacement maintains reliable starting. Black carbon deposits indicate a rich mixture from a clogged air filter or gummed carburetor.
Ignition Coil for the CV490S
A failing ignition coil produces weak or intermittent spark that causes hard starting and misfiring under load. Test spark output with an inline spark tester before condemning the coil.
Why Choose Repair Clinic for Kohler CV490S Parts
- Genuine Kohler OEM Components: Carburetors, air filters, spark plugs, and ignition coils confirmed for the CV490S 490 cc OHV engine Kohler small engine parts.
- CV490S vs CV491 Series Distinction: The CV490S single-cylinder configuration is distinct from the CV491 V-twin series. Confirm the full engine designation before ordering carburetor or ignition components.
- Small Engine Repair Resources: Carburetor service and spark plug replacement through small engine repair help.
- 365-Day Returns: Return any uninstalled Kohler part within a full year of purchase with no restocking fees.
Kohler CV490S Small Engine Parts FAQ
What is the Kohler CV490S and what equipment does it power?
The Kohler CV490S is a 490 cc single-cylinder OHV four-stroke engine from Kohler’s CV series. The S suffix identifies a specific shaft or starting configuration within the CV490 engine series. This engine is commonly installed in walk-behind mowers and smaller outdoor power equipment requiring more torque than compact engines.
Why does my Kohler CV490S not start after winter storage?
Hard starting after storage is almost always caused by carburetor varnish from ethanol-blend fuel in the float bowl during warm months. Drain the float bowl before winter storage to prevent this. Replace the fuel filter and clean the carburetor before ordering a replacement.
Why does my Kohler CV490S surge at idle?
Rhythmic idle surging is most commonly caused by a dirty idle circuit in the carburetor from ethanol varnish deposits. Cleaning the carburetor idle jet resolves surging in most cases. If cleaning does not resolve the surging, a replacement carburetor is required.
How often should I change the oil on the Kohler CV490S?
Change the oil after the first five hours on a new engine, then every 50 hours or once per season. Use the oil viscosity specified in the owner’s manual for the CV490S engine platform.
