The 75 hp Continental engine in the Fly Baby stumbled at about 2,000 rpm. When I pulled the carb heat, it ran smoothly. Even after taxiing with the carb heat on, it still needed carb heat to run smoothly at the higher rpm. I am thinking the carb heat was not eliminating ice, but rather changing the fuel mixture from lean to rich.
Heres my first question: Am I right in thinking carb heat makes the mixture richer? And that for it to run properly without carb heat, the mixture needs to be made richer?
If the problem is the mixture, then heres a follow up question: The problem occurred today when the temperature was about 35 degrees Fahrenheit. The previous owner only flew it in nice weather 70 to 85 degrees Fahrenheit. If he had the mixture set for the warmer weather, could the colder weather have made the mixture so lean as to cause the problem?
Heres my first question: Am I right in thinking carb heat makes the mixture richer? And that for it to run properly without carb heat, the mixture needs to be made richer?
If the problem is the mixture, then heres a follow up question: The problem occurred today when the temperature was about 35 degrees Fahrenheit. The previous owner only flew it in nice weather 70 to 85 degrees Fahrenheit. If he had the mixture set for the warmer weather, could the colder weather have made the mixture so lean as to cause the problem?
