I guess it's coming up to speed. Looking at the ripple from the pool jets and looking at the water in the skimmer, I'd say water is circulating well. The pressure gauge on my oversized sand filter now reads about 8lbs whereas with the old pump motor it was more like 18, but I didn't know if that was an issue. The pump still runs my automatic pool cleaner just fine.

I've just accepted it's likely that at some point, I will be purchasing and installing another motor myself.