Good Day All,

I have a Brison 3.2, just installed on a 29% Giles 202. The prop is well balanced. Then engine will vibrate quite badly at idle and smooths out considerably when the throttle is advanced. At full throttle the vibration is acceptable.

Additionally, in the midrange speeds the engine tends not to run very smoothly (sounds rough). The vibration at midrange speeds is not a problem.

I've been reading other posts and get the opinion that my low end mixture might be too rich.

Any Suggestions?

Cheers,

Marcus.