[hharney]

Governor and/or prop. Could be some restriction in the journal through the crank too. I went from McCauley to MT's back in 2002. Kept the same governors, but always noticed that the feather on the rear was always more responsive than the front. Rear engine had been replaced and governor OVH'd more recent than the front. Looking at my logs not sure the front governor had ever been done. Replaced the front engine in 2015 and had the front governor OVH'd and SHAZAM the front now is just as responsive as the rear. Rear governor was OVH'd the next year due to some issues with the prop hub and prop was OVH'd so Rear continues to be consistent. When the rear prop was removed 2 years ago there was quite a bit of sludge in the journal. Not to the point it would restrict but sizable amount, I thought.

How long and how many hours on the governors? I have some photos of the sludge if you happen to pull your prop to inspect.