New 912 Operators manual

Rotax sometimes overlooks the revision bars in the updated manuals, as is the case here. I want to bring your attention to the RPM MAG drop limitation, which can be found in the most recent operator's manual released on January 01, 2023, for the 912, 912S & 914 operators manual.

As part of the ignition check, after the engine has warmed up and prior to take-off, please ensure that you check the two ignition circuits at 4000 rpm (approximately 1700 rpm propeller speed). The drop in speed (engine rpm) when using only one ignition circuit must not exceed 500 rpm (approximately 210 rpm propeller speed). Additionally, there should be a maximum difference of 150 rpm (approximately 65 rpm propeller speed) when comparing the speeds (engine rpm) obtained from either circuit A or B.

Please refer to the most recent operator's manual for detailed instructions and information regarding this procedure.

Thank you for your attention to this matter and we apologize for the delayed response. 

https://www.rotax-owner.com/pdf/OM_912-Series_ED4_R1.pdf

Curious about another item in the OM, it’s the Figure 3 (performance chart 912A/F/UL) on p.5-4. At the top left on the chart there’s a note “5800 1/min take off performance”.  Chapter 2, p.2-2 in the OM states takeoff speed is 5800 rpm for five minutes, without further restriction.  Can anyone clarify what that “1/min” means on the chart on p.5-4? Edit: I believe that means RPM?