Ok, so the plot thickens. I ran to the marina to investigate some more and see if I can locate some part numbers etc. I turned the water pressure on and timed the water pump primes. 1st was at 50 seconds, then at 01:17 after the first, 01:30, 01:46, 01:53, 01:59, 02:02, 02:05 adding a little...