Imco SCX-4 - info
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I had water pressure problems with my initial through hull setups so I ditched them and tried getting water from the drives only. As I started throttling to get on plane water pressure would climb. As soon as the boat started to nose over the water pressure dropped to 0 PSI.
I kept playing with the through hulls. The problem ended up being the Hardin SS raw water pumps. All I can see is that the impeller cavity is a bit smaller than on the plastic housings.