503 ENGINE DIAGRAM

Rotax 503 Charging System - challengers101
The charging system of the Rotax 503 is a 12 pole, flywheel generating system. The FAA refers to it as a lighting coil instead of an engine driven alternator.
Rotax 503 UL DCDI 50HP - Rotax Service
Rotax 503 UL DCDI 50HP 2-stroke engine specially developed for recreational aircraft 2 cylinders, cooled by fan Piston ported intake Dual capacitor - March 18, 2019. Rotax 503 UL DCDI 50HP 2-stroke engine specially developed for recreational aircraft 2 cylinders, cooled by fan Piston ported intake Dual capacitor - March 18, 2019.