Rough O-200

[Bill Greenwood]

Tom, The trouble must lie with the first carb, the overhauled one,just as you say, even when it is no longer on the airplane, . Why couldn't I see that all along,rather then trying to discuss the symptoms and what Eric had already checked and ruled out?

So it must be the carb that was overhauled, and even when it is not on the engine, it must have left negative vibes, that only occur under 1200 rpm.

We once actually had trouble with an ovehauled carb on a SNJ, got it back from the oh shop and while the plane would start and run it would die at idle, Turns out the oh shop does a lot of duster engines which spend a lot of time idling and the shop had set the float level like they do in dusters, thus too lean for the SNJ.