Another question about this. Bought the boat new Jan it 2017. Had good water pressure all season and it showed on the guage. This is on a 721 phoenix . The Guage is fed by a pressure swith. I had 20+ lbs most of last season at wot. At the end of the season it got way less and at the last event, I got a steady alarm at idle. Rev it up and it stopped. I couldn't idle for more than 5 minutes without the steady alarm sound. I installed a vessel view mobile and ran it for the first time this season. I got the dreaded steady alarm again after around 5 minutes. The vessel view showed 0-1.5 lbs at idle and 19 at wot. The stream at idle is not very strong. My motor had 56 hours on it. Could it be a bad impeller already?? Thanks Lee