31200-ZW5-003 Starter Motor Assembly - Overview. The 31200-ZW5-003 Starter Motor Assembly is an essential component of Honda marine engine systems. It plays the crucial role of initiating the engine's combustion cycle by engaging the flywheel to crank the motor, ensuring the engine starts smoothly and operates reliably. Specifically designed for Honda 115 and 130 HP 4-stroke outboard engines from 1999 and newer, this starter motor assembly matches factory specifications and tolerances to deliver