Engine sputter
in 912 / 914 Technical Questions
10 years ago
Still relatively new to the Rotax family of 912ULS engines, I am learning on the go. This morning I was up for an early flight, temps around 21C with humidity feeling like 25C. I had been up for about 30 minutes at 3000 feet when all of a sudden the engine sputtered for a couple of seconds and then returned to normal operation. I use 91 octane mogas in the engine and there was at least 10 gal. of fuel in each tank. The tanks were filled by myself 2 days ago. The plane is always hangared. So my question is this. What could possible have caused the engine to sputter like it did after being in the air for 30 minutes. Could it be a vapour lock and if so, how does one prevent this from happening again? If not a vapour lock what else might it be? I always buy my mogas from the same busy gas station so I don't believe the quality of the fuel should be an issue. I did not do a water check of the fuel this a.m. as I was up yesterday for about 1.2 hours with no issues. Any thoughts or suggestions would be appreciated. The engine tach time is 345 hr. and I have put approx. 55 hr. on it in the last 3 months.
