QSC ISA750

Marsoni

M251S

$622.50

Get it in 3 business days with 1 day shipping. Friday, May 29

QSC ISA750ISA750 Commercial Power Amplifier Features Rear panel gain controls for tamper resistance; 2 dB detents allow for quick and repeatable settings XLR and detachable Euro style input connectors DataPort V2 for use with DPV2 compatible signal processing accessories (XC 3, SF 3, LF 3) and DSP 3 DSP 4 (with external power supply) Independent defeatable clip limiters for reduced distortion Two tier Class H complementary bipolar output circuitry reduces AC

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Hi....I apologize it took me a while to get back to you with my results. Here is what I discovered about the pump and will also apply to some of the other comments I read in the reviews with people not getting the pump to work: 1.) I removed the pump to check the proper direction of the impeller and it was correct as can be seen in the photo. 2.) I built a pump shaft attachement so that I could operate the pump with a power drill. 3.) I attached the water muff to the unit and tried to pump water.....it wouldn't do so. What I did see however was that even at high hose discharge and small leakage at the muff I could not fill the water cavity in the housing. 4.) I installed a strap around the muff and tightened it very tight and THEN at high hose pressure I was able to get the cavity to fill with water. 5.) At that point I activated the drill and was able to get the pump to actually pump water. I then removed the pump housing and removed the O-Ring that resides on top of the impeller, reassembled and it would not pump water. Since the O-Ring sits higher than the original does I wanted to make sure that it was necessary to have it in the pump. 6.) I reassembled the engine and kept the tight strap on the bottom and finally it pumped water into the engine. My conclusion that you can reply to other buyers if they have a problem: Do NOT underestimate 2 things....1.)the lack of ability of the pump to draw water up AND 2.)the fact that if the muff leaks it will NOT fill the cavity when common sense says it should. This was a 120hp Johnson. The engine bottom must be immersed fully or the muff must be very tight on the lower unit for the pump to function. Please feel free to post this if you wish.

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Reviewed in the United States on August 12, 2024

Verified Purchase

Monchita

Whiting, US

★★★★★ 5

Exelente

Size: For 85-300 HP

Exelente

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Reviewed in the United States on March 21, 2026

Verified Purchase