I have Glasair II with I-O360. When training and running low power for
extended periods I get a little roughness. If I run it harder then I don't
get the roughness. It may pop on final or while taxing, my mech said it is
because the plugs get "loaded up". Meaning a little fouling. When my
instructor wants me to stay at 90kts my power settings are very low and the
engine oil heats up to a little over 200F. Other wise it runs 190-195. This
is because airflow and nose high attitude.


Steve