Thanks. This engine is awesome! She runs like a raped ape and still comes off the track at 184*. I don't believe the engine is rich, it just runs cooler. My K9 in the summer heat would only run at 210* to 225*. My Clockwork JL .21 runs cooler and faster then my buddies (another modifier) RB shark 9, his engine is coming off at 240* to 260*. My runtime is still at about 9 1/2 minutes, Im finishing my heat races with 1/2 tank.