How do you determine top dead center for a Kohler cv490s gas engine?

To determine top dead center (TDC) for a Kohler CV490S gas engine, first remove the spark plug to facilitate easier rotation of the engine. Next, use a long, thin object like a screwdriver to gently feel for the piston as you rotate the engine's crankshaft in the direction of normal rotation. As you approach TDC, the piston will reach its highest point. Mark the position on the flywheel where the timing mark aligns with the case, ensuring you have identified the exact TDC position.