Help; Rough running Continental O-300D

On 23 Jun 2004 00:26:39 GMT, (JFLEISC) wrote:

Idle and mag check was good. Static RPM check was was okay. However when
throttle up engine ran rough.

Problem is, when I throttle up it runs fine.

Jim

One possibility is that if you throttle up quickly your accelerator
pump could enrichen the mixture a little too muck since the carb is
also adding more feul and air. What happens if you throttle up at a
little more than a snails pace? If it works better going slowly this
may be the problem.

I know I haven't explained it well cuz I'm tired, but let us know how
a very slow advance works out. In my plane I don't have this happen
if I go slowly, otherwise it sounds as you describe.

HTH
z