While doing several short (Young Eagles) flights, our RV-12 (912ULS) started running very rough at 3100 RPM, and would not go any faster. The engine runs fine at idle and the carbs were in proper balance. Per the universal 012 mantra, "check the carbs", I found a carb float bowl gasket that was bunged up. On replacement, the engine started running normally. Reviewing the RotaxOwner carb rebuild videos, there was a short comment to the effect "check that the gaskets are placed properly, or the engine may run rough".
Well, the problem is solved, but I just wanted some confirmation of the symptom/fix from collective wisdom of all, and maybe an explanation: With a leak in the float bowl gasket, I'm assuming this either 1) messes up the fuel level in the carb bowl, starving one side of the engine or 2) messes up the pressure differential in the CV mechanism (which I don't fully understand).
As I said, the problem appears to be solved, I just need confirmation that the leaky gasket is a viable cause of the problem.
Well, the problem is solved, but I just wanted some confirmation of the symptom/fix from collective wisdom of all, and maybe an explanation: With a leak in the float bowl gasket, I'm assuming this either 1) messes up the fuel level in the carb bowl, starving one side of the engine or 2) messes up the pressure differential in the CV mechanism (which I don't fully understand).
As I said, the problem appears to be solved, I just need confirmation that the leaky gasket is a viable cause of the problem.
