I have about 60 hours in a pa28-151 (160hp) that is a rental locally.
It does the same thing. The Mechanic as rebuilt the carb a couple times
and still can't figure out what is causing it. Only does it
occasionally and doesn't seem to require a fast reduction in power,
just a reduction in power. In fact it is more noticable when doing
smaller power reductions. It has been doing it for a couple hundred
hours now.

Would love to know what causes it as would the Mechanic.

Brian
CFIIG/ASEL