Mitty wrote:

I am about to get checked out in a Civil Air Patrol 172 that has an
STC'd O-360 installed in place of the original Lycoming O-320. The 172
POH wants carb heat on approach. This makes no sense to me. If I have
to do a go around it is just one more workload item/one more thing to
forget and, from my Piper experience, it does not appear to be
necessary. My guess, without benefit of any actual facts, is that this
POH requirement comes from Cessna's Continental roots and has no
engineering justification. So it seems wise to ignore it.

Your Piper experience differs from mine. Facing a long slow ILS through wet
clouds in a Piper, I'd set full carb heat, a minute or two before reducing
power. Ever taxi off the runway and have your engine quit?