New owner here... boat was already out of the water by the time we completed the purchase. Seller told me the AC water pump was bad and needed replaced. I want to pull the pump out to confirm it is defective. So couple of questions. What is the best way to test the pump now that we're in winter storage?

Also, how do i confirm that this pump is the original pump that came on the boat? Reson for the qustion is a buddy of mine has a 34' Silverton with a single AC unit and the pump he just replaced on his was 500gph. The one in my boat currently is only 300gph and, if i'm not mistaken, is supplying water to two AC units.

I'll try to attach a picture of my existing pump.
Is that enough volume for two AC units?


Boat is approx 2 hours from home, in storage, but they are winterizing tomorrow so i'm going up this weekend to grab the batteries and take some additional pics and measurements. White there I was going to pull the pump and check the strainer while i'm at it.