ORIGINAL: raptureboy
Yes I have flown them without the cowls and still the same issue. I also have the ignition batteries fully charged, 2000 mah and 4.8 NMH brand new. I find it very wierd that 2 engines both started doing the same thing. I did recently mix a new can of gas and even though that has a filter on it also I am wondering if that could be the problem. Again both engines start and run fine on the ground, at all differnt throttle settings and takeoff's are not a problem and up until a week ago they have been running great. It's only when I get about 3 min into the flight that they start bogging down and then quit. I have readjusted the needles back to original settings and still no luck. I'm going to throw out the gas and make a new batch. I have gotten real good at dead sticking[&:] but I'm getting tired of walking to get my plane[:@]. Thanks again and keep the ideas coming.
Well, as you say it's effecting both engines the same way, so it has to be something common to both engines. The "bad gas" theory makes the most sense to me. Maybe you mixed the oil in twice? I'm getting close to the age where I'm afraid that I might forget to add the oil in[X(].
Or it could just be bad gas? Let us know if a new batch fixes the problem.