I got tired of listening to the water pump struggle to pressurize the system so I threw caution to the wind and replaced the pump. Four screws to hold it down, two screw on water fittings, two wire splices and it was done. I did not have a new strainer so I reused the old one. It was spotless anyway. It now pressurizes instantly and shuts off as soon as the tap is closed. it is also much quieter.
I am always just a little cautious in Mexico when I have to tear something apart. Back home I always have the fallback position of taking it in to an RV shop if I screw up but in Mexico that is not an option. If something goes wrong down here you fix it yourself or hope a smart neighbor moves in.
We now have good as new water flow, no leaks, Norma is happy and Life Is Good!