Recently my 915 has started to occasionally cutout during the take off roll or initial climb for less than 1 second. It only happens a single time, and usually on the first flight of the day, and the engine immediately recovers and continues flying great for the rest of the day no matter how many take offs, landings, engine starts/stops, etc. I did have it happen one time later in the day after adding fuel, but that is the only time I've had it happen outside the first take off.
Clearly this is concerning as any engine cut no matter how brief is scary, especially during take off. Does anyone have a clue as to what could cause this or how I could investigate? There are no lane lights, and I've looking through the Garmin logs and I don't see any faults in the data parameters Garmin collects. The fuel pressure is solid the entire time, as is manifold pressure. There are no lane lights or engine errors showing on the G3x.
My initial thought was a small bit of water somewhere in the fuel line since it tends to only happen on the first flight of the day. I always sump my tanks and I'm not finding any water during my checks, but maybe a little bit is collecting somewhere the sump is missing? But more recently with this happening after a fuel and lunch stop the water theory doesn't make sense. Many other planes had been using the fuel pump at the airport that day so I think it is unlikely I would have picked up any contaminated fuel from the pump, and the gas burned great for the rest of the tank.
Would the Rotax ECUs be able to provide more information if I went to a shop and had them pull the logs? I'm really stuck at how to troubleshoot this issue.
