Got a Jacuzzi 340. While in the tub, the jet water flow from pump 2 just stopped working but pump keeps humming.

No vent plugs that I can see
Put finger over heater outlet but think thats another pump
Pump 1 works fine, hi and lo
Took inlet, outlet pipes off of pump 2, water flew everywhere. Put it all back together and still, pump hums but no water shooting out of the jets, and I love those foot jets.

Any help?

If it's humming, but not actually turning, then your motor's dead on that pump and needs to be replaced. You'll notice quite a big difference in the way it sounds.

Something like this probably http://spapartsnet.com/products/MOFE01.html

The spindle that protrudes out of the motor and into the housing that the water tubing is connected does spin Pageup and when I disconnect the "oubound" tubing, it shoots water out, but I'm not sure if it is just the pressure of the free flowing water from the inlet tube going through the housing and out the open end or if it's the pump pushing it out. I disconnected it and turned the pump on. Thank you for your prompt reply and assistance by the way.

Probably one these three is your answer.

1. You've got something stuck in the suction side of the impeller. What I do (with the power turned off) is close off the valves to the pump, remove the suction side hose, (the one that's inline with the pump on the end), and then feel around inside the end of the impeller to see if there's anything jammed in it. It could be a single leaf, a few of those little helicopter thingy's that fall off trees (don't know what they're called but two or three of those things can stop any pump cold), pine straw, hair baretts, little jack in the box toys from kids, etc.

2. Your impeller has cracked and not allowing for proper pressurization in the pump cavity. The centrifugal force of the slinger, (impeller), can be nullified by cracks allowing water pressure to escape from where it shouldn't.

3. Your impeller has actually separated (broken off) from the plastic impeller shaft itself. But this is a bit unlikely as when this happens, most of the time it will create a lot of water leakage around the shaft seal. But, it would still try to spin up, just not enough to actually create real water pressure. These kinds will be quite noisy.

I'd like to think that door number 1 is the most probable. If not, then you'll need to pull the pump, and disassemble the wet end for visual inspection. Once you do that, then whatever's wrong will be staring you right in the face... Here's an example of a pump being disassembled, it won't match yours, but it's pretty basic and in line with the way most pumps are made: http://spasupport.com/seq/werep/cswerep1.html

Hope this helps.

Pageup. Thanks again, I'll do just that. You're a real asset and I appreciate your responsiveness!

One more rookie question. When I remove the big (3" or so) hoses from the pump, all the water from the tub starts pouring out. How do I plug those to keep the water IN the tub when I disconnect them? I've got 2 filters so I could put a can over those, and also 3 covered drains down by the floor of the tub.

Thanks again page.

Well I'm kind of suprised that yours doesn't have shut-off valves on it. Especially on a Jacuzzi™ brand hot tub. Not knowing the age or skirt design, I'm a little out of the loop on this thing. You might want to post a pic of the guts of this spa, or send it to image91@spanet.net and I'll see what I can come up with.

The below pic will give you an idea of what the shut off valves should look like. Note, that the valves and pump were hidden behind a section of the skirt that must be removed by taking out a few screws, and folding back the skirt to get to it.

Jacuzzi 340, last years model and no shut-off valve. I'll just work quickly! Thanks again pageup