1997+ Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-826148R2, Page 64Get this manual
CAPACITOR CHARGING #2 CDM The flywheel rotates the permanent magnets past the capacitor charging coilscausing the coils to produce AC voltage (260320 volts)The opposite voltage pulse is then conducted to the CAPACITOR DISCHARGE MODULES (CDM), where it is rectified (DC) and stored in capacitorThe stator voltage return path is through the ground wire of the other CDM and back through that CDM's charging coil wire to the capacitor charging coilsS NS