What actually happened was I had about 3 flights in and on the 4th the exhaust muffler fell off and I noticed the color of the oil on the side of the plane. I would describe the color more as a graphite color and I dont hear any bad noises when turned over. I won this engine in a raffle probably 4 years ago and am just now getting it in a plane, so I really havent got anyone to fall back onto in the way of a warranty. I have heard where these motors are hard to get broke in. It seemed as the more flights the I had the higher the rpm was getting.
Thanks
Jeff