Got new autometer gauges in and am wondering about the water psi gauge. I have it screwed into the SB side intake plug right next to tstat in my hp500. Is this a ideal spot because Im only getting about 5psi reading off gauge at speed but engine temps stay steady 150*. Had it out all day yesterday and no issues. Brand new impeller last week and all debris that could be found was removed in housing and oil cooler. Even took output hose off sea pump to check flow and seems good. Have a video if interested. What should "normal" reading be?

I also have an autometer water pressure gauge. I have the gauge tube T'd in just past the seawater pump, prior to my first cooler. I see just a few lbs at idle, and have seen as high as 30psi at 85mph. Generally cruising it's around 15-20psi. Hope that helps.

Thats what I was looking for yesterday! Got a link of that fitting? Thx!

Also whats ur oil temp at 3/4 to full throttle? Mine climbs to 140* and stays there till I bring it back down.

I have always seen water pressure taken from the side of the block. Closed cooling will see higher water pressure. If you are actually putting the pressure in the engine and not a heat exchanger, I don't like to put more than 20psi on intake gaskets.

With IMCO lower I have had to put relief valves in. I have seen exhaust alone make the biggest change in pressure depending on how high of flow the dump is.