Originally Posted by
RodneyFord
Hi Ken. I agree with you and that is what I usually do. However this motor has been vibrating a lot and isn't doing the airframe much good, so I am going to sort it out on the bench. Specifically it has a mid range burble which is causing the vibration. It seems like DA has addressed this problem with the DA35 which has some sort of mapped ignition timing. So I am wondering if this motor on a pipe will be a better option.
I'm not a 2C gas engine guy even though I'm a former Stihl tech. (hate the chain saw sound). But from what I read and have seen this seems to be a common problem. From what I know a large part seems to be a carburetion issue. These carbs do not have the midrange calibrated. Basically they are idle and WOT. I've heard it can be tuned out to some extent but the engine needs to be well broken in first. You'll get it figured out as that is the type of person you are. Great project, good luck finding the issue.
Ken