Replacement Short Block
For Kohler CH20S engine. Spec Number 64588
Comes with Cylinder block, pistons, valves, rod and crankshaft balancing gears and oil pan
Crankshaft Dimensions: 1-1/8" x 4"
Width: 1/4"
Keyway - Tapped 7/16-20

For help locating the correct Kohler replacement parts, contact our Kohler Engine Specialists at 800-305-9255