Kohler Voltage Regulator Rectifier 12 - 15 AMP for Mowers — Fits 25 403 37-S, 2540303, 4140309-S, 4140310S, CH640-3156, CV742-3041

Replacement Kohler voltage regulator/rectifier rated 12 - 15 AMP, engineered for use on lawn and garden mowers. This unit rectifies alternator/stator output to DC and helps maintain correct charging voltage for the battery and electrical system. Compatible with Kohler part numbers 25 403 37-S, 2540303, 4140309-S, 4140310S and compatible with engine/model references CH640-3156 and CV742-3041. Use as a direct replacement to restore reliable charging performance; confirm part compatibility with your mower model before ordering.