Bosch 1850866000 Starter Motor Assembly

This 12V 1.8kW starter motor assembly features a 9-tooth pinion designed for direct flange mounting on Perkins 403-15G, 403D-15, and 100/400 series industrial diesel engines. The unit delivers clockwise rotation and meets OEM cranking torque requirements for cold weather starting in construction machinery and aerial work platforms. Constructed with a high-torque permanent magnet or field coil drive, the housing integrates a solenoid switch rated for 12V DC control circuits. It serves as a direct interchange for Perkins OEM part numbers 1850866000 and 185086600, and Bosch OE reference 0001109035. Verified compatibility spans Perkins engine models 403-15, 103-10, 103-13, 104-19, 104-22, 403C-15, 403D-15T, 404C-22, and 404D-22TA variants.