Rach

Impeller and seal have been replaced, I took a dremel with a sanding attachment to the motor shaft, reassembled, and it's filled and running! Turned out to be a 1hp impeller (a Gecko Aquaflo 91693601 was an exact match for a 300T Softub from 2010, in case anyone comes across this thread in the future). Thanks for all the advice regarding the impeller and seal removal and motor shaft cleaning!

Yeah, I had to cut and chisel off most of the impeller (and the piece with threading on the old impeller is now in pieces), but it's off and the seal is out now, so far so good. Now just need to clean up the shaft; hoping I don't need to deal with the bearing, the shaft seems to turn alright now that the impeller is off, and I don't really know what I'm doing if I have to open up the motor itself.

Thanks! Finally got in touch with someone who rehabs softubs for a living, and he confirmed that this model uses a 1.5hp impeller. As you suggested, my plan is to get this thing off somehow/likely breaking the impeller to do so, getting all the rust off with a wire brush, replacing the impeller, seal, and possibly bearing. We'll see how it goes!

Thanks. I know I may need to replace the seal as well, and potentially other parts; I of course won't know for sure until I take it apart further, and get the rust off the motor shaft and such. Would you mind explaining how you know from the OPs photo that it's a 3 hp impeller, considering that according to the Softub website, the motor is 1.5hp, and from this old parts catalog (my T300 is from 2010) the impeller is 1 hp (https://www.yumpu.com/en/document/read/10596922/softub-parts-catalog)? Wondering if OP ever found the correct impeller for their repair.

Hi, I'm wondering if you ever figured out what HP impeller you needed? I just acquired a very old T300 Softub and am trying to get it working -- the impeller doesn't seem to turn (with my hand, GFCI trips when plugged in), and like your photos, the whole shaft is totally rusted out. I'm trying to figure out if trying to replace the impeller is worth it and what I'd need to buy, but everything I'm finding seems to indicate that the Softubs use a 1.5HP Aqua-Flo impeller? Wondering if you ever determined what you needed to buy (and if you did, if you have any idea if it's the same for the T300 as your 220). Thanks!