Thanks for all your input guys. I am embarrassed to say that I have found the
problem.
Same as Pete below, I had left the vent pipes disconnected after removing
the plenum chamber to check some coolant pipes for leakage a while ago. I
guess this also explains the strong fuel smell when the engine was running.
I will save all your answers for next time!!
Now smooth as the proverbial baby's bottom.
Richard Iddon
G-RIXS
On 7 Mar 2012, at 16:50, Pete Lawless wrote:
>
> Richard
>
> Have you got the little plastic pipes from the carbs connected into the air
> box?
>
> I have had exactly the same symptoms on my 912 when I left the pipes
> unconnected after working on the aeroplane. Good in the climb and missing
> and rough when I pulled the power back.
>
> Regards
>
> Pete
>
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