I installed a Faria water pressure gauge on my 1990 Johnson 115 V4 Crossflow, (as well as a water temperature gauge 100-240F), since the engine is new to me and I have no idea of the age of the impeller or the condition, I'm wondering what are good readings on the water pressure gauge? At idle speed 700 rpms it was at 6 lbs., at 3300 rpm it was 18 lbs., and at WOT 5300 rpm it was 27 lbs.
