There is no drop in actual RPM. Any drop that brief and sudden would be
detectable in the sound of the engine, especially on soft mounts with all
that rotating inertia. I've listened carefully when this is happening and
there is *absolutely* nothing detectable in the engine sound or feeling
through my feet.

This is also a change in behavior. It didn't do it the last two seasons or
early this year.

--
Roger Long