One additional detail…
Even if using 35% throttle position to start a 912iS, the RPM will always exceed 2000-2200. Sometimes it will even exceed the alternator switchover RPM of 2600. Rotax expects this to happen and specifically specifies it for a few seconds to activate the switchover. You are THEN supposed to retard the throttle to keep RPM below 2500 until oil temp reaches 120 F.
Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.
Van's Aircraft Engineering Prototype Shop Manager
RV-6A (aka "Junkyard Special ")