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I had a 1987 Jacuzzi, Downeast spa, with a junk control panel, a failed 1 HP pump/motor, a blower that used to work, and 7 inline Hydro-jet jets 4 of which have new ($35 each) rotary carousals.

To save money (HaHa) I bought a Brett Aqualine EM-190 (digital) spa pack with 2 HP 220 volt pump/motor A 2 HP 110 volt blower and a new spa cover.

I installed everything no problem.
EXCEPT
The blower (2 HP) would trip off after a few minutes. I Tested pumps and blower to verify proper operation. My plumbing experiments led me to believe that I was getting insufficient flow for cooling of the blower motor. I determined this by plumbing the discharge of the blower through a 1 1/2" PVC to the bottom of the spa. The blower blew lots of water out of the spa and did not overheat.

So I removed ALL existing plumbing, saved the filter canister, saved pump/heater/blower/control console, saved the 4 rotating carousals since they are relatively new.

The punchline:
I have everything except plumbing to bring the Spa back to life. My problem has been insufficient flow to cool the blower. This is what I am thinking:

Replumb with in-line (vs plenum style) 12 venturi jets (upgrade from the original 7) and add 16 air injectors. Locate the additional injectors in the floor to solve the air flow problem.

In this setup the inline air for the jets would supply the 16 air injectors (located on the floor of the spa) through 2 manifolds in-line with the jets.

I believe (guess) that placing the 16 air injectors on the bottom (6 inches below the jets) will provide sufficient head to favor the jets for air usage
but allow excess air to flow out through the injectors.

I need Advice, My spa edjucation started early in July with the purchase of a spa pack (to save money) and now I am redesigning a spa. By the time I am done I will have spent $2K and am fearfull of having nothing to show for it.