Leaky Motor My 1 HP jacuzzi magnum pool pump was leaking from underneath. I replaced the difuser as I thought that was cracked however it is still leaking. I'm thinking something inside the motor itself is cracked (seal is fine). Would it be cheaper just to replace the whole motor rather than trying and hoping I can find what is wrong? The motor is only 1 yr old.

SOURCE: I have a jacuzzi magnum force pool pump. A leak

you need to replace the shaft seal.

SOURCE: Hi I have a magnum 1000 Jacuzzi pump for my

alot of companies use to have a damper ring on pump shaft which would knock down some of the noise a pump motor made pumps make noise and the bigger the pump the louder the noise if its not vibrating or clunking then its running as it should

SOURCE: jacuzzi magnum force 1hp, pool pump. Motor has very loud noise

most likely the bearings are starting to go.

SOURCE: I have a Jacuzzi Magnum Force pool pump. 3/4 hp.

The other end of the shaft has a place to attach a 7/16 or 1/2" wrench. also, there might be a "Reverse Thread" screw in the center of the impeller that you must remove first.

SOURCE: Leaky 4 HP hot tub pump seal AO SMITH motor, pump

If you have removed the impeller this is what you need.
Part number for your shaft seal is : 37400-0028s
Here is a link to the manual on how to install / remove this seal on this pump:
http://www.hottubs.com/content/pdf/Sta-Rite_Dura-Jet_S377(9-12-03).pdf
Refer to page 9.
This seal can be purchased anywhere on the internet. Just do a google search with only the part number. Many suppliers will come up. If you have trouble, I have a few and can make an E-bay sale for one.

Testimonial: "Thanks, and especially for the link to the manual. This is exactly what I needed. Mark"