Re: water pressure guage
Great Lakes Skipper (greatlakesskipper.com) has the best selection of new old stock gauges I've ever found. Great prices as well. Water pressure varies by RPM and actual reading depends on the condition of the impeller. It is recommended that when you install the gauge you replace the impeller. Then note pressure readings at idle, mid range, and wide open throttle. Any deviation from those numbers in the future is an indication that the impeller needs attention.
