Looks like we're better off going with a whole new pump/motor assembly. My pool originally came with a 2hp motor, but since then we've added solar heating.

Would jumping up to 2.5hp be any sort of major issue? It looks like I'll be moving more water, which is a good thing, because sometimes we have 10-12 people in the pool at one time. I need that turnover!

In the meantime, I bought a 1/4hp submersible pump to keep the water moving from the deep end into the hot tub. I'm not letting my pool turn green!