2005 Ski-Doo RT Series Shop Manual, Page 133Get this manual
Section 04 ENGINE MANAGEMENT (SDI) Subsection 01 (OVERVIEW)
OPERATING PRINCIPLE
For this SDI 2-stroke engine, highly advanced engine management system (EMS) has been used to ensure high power output combined with cleaner combustionAn ECM (Engine Control Module) calculates the proper airfuel mixture and ignition timing for each cylinder separatelyThe fuel is injected into the transfer port of each cylinder
CHARGING SYSTEM
The magneto is the primary source of electrical energyIt transforms magnetic field into electric current (AC)The magneto has phases, delta wound stator on 18 polesCapacity is 480 wattsAC current is rectified and regulated between 13.4 and 15 volts for the vehicle electrical systemIt supplies the ECM with DC currentVehicle 12-volt battery supplies the ECM with DC currentA35C3SA
1Ignition coil
AIR INDUCTION