Basic description of Generator and Lane system operation

Just another note for all.  In an injected engine the "mag" check normally will not drop RPM.  Several things are going on.  With our legacy ignition engine each spark plug is off to the side, not in the middle of the cylinder.  The flame front will expand slightly slower to fill the cylinder in a single plug check (mag drop) due to this factor.  

In the injected Rotax we have 2 ECU.  One is full of sensors and allows the engine to have an ECO mode as we are aware.  This is Lane A.  The other, Lane B, runs almost entirely on a map, it has all the presents for RPM and fuel flow.  It is the default lane if there is sensor failures so it is always on the rich side for that reason.  (the ECU connections tell the story, Lane A has 2 large connections and Lane B only 1) Generally in the injected engines you will actually see a slight increase on Lane B only running in a MAG check at 4000 RPM.  Engines running in mid range like this like to be a bit richer so this is normal.  The important thing is you can run on each lane and it will be smooth, dont worry about drop. 

Cheers

Thanks RW, that fills in some blanks for me and fits with my thinking regarding how the system functions.