Tunze 9002 - still not skimming..

[Nano]

So my skimmer has been on the fritz for months now, probably causing or adding to some of the problems in my tank. I recently discovered the power cord was cracked causing it to stop and start etc. So I replaced the motor yesterday.

While I know it can take a bit for it to start producing, it doesn't look right. It's producing the fine bubbles typical of the 9002, but they arent even reaching an inch into the neck.. even after 24 hours it should start to bubble a bit higher, but hasn't. I'm not sure what's wrong at this point, I have disassembled it yesterday, clean the clear elbow that attaches the airline to the venturi pump, but it seems like the bubbles are bursting before the collection cup. I'm not sure if the motor is sitting to high, the skimmer is at the right depth, but nothing is happening.

Anyone with tunzes or experience with them your help is appreciated.
I need to get this thing back on line asap.

Thanks