You, my friend, are a wealth of knowlege. This is a great forum and your advices is MUCH appreciated! Okay, there's nothing printed on either sticker which gives the lower HP rating (I've determined the capacitor is the low speed one), so how do I calculate using your formula? The voltage of the motor is 230 V and amps are 11.7/3.5. I've attached photos of the two stickers if you can see them. I'm pretty naive about all this electrical stuff (can you tell?).

Thanks again

Your motor is grossly overrated, and this is normal for pool and spa pumps. Based on calculations, you have a 3HP motor with a low speed of just under 1HP. When you get your capacitor, keep this in mind. I believe a 161-193 MFD would work for you. Of course, you will want to verify that size with your motor repair shop if possible.

Thanks, I was able to decipher 72-88 MFD off the casing after all. I also located a replacement at a nearby electonics shop (last one) and will install it tomorrow, keeping my fingers crossed. Here's a shot of the capacitor with its guts blown out and a close-up of the visible numbering on the side.

Done! Installed a new capacitor ($10.95); put the motor back in the tub; and presto, she works like a champ again. Sure beats buying a new pump. Thanks again Charger 1. Couldn't have done it without you.