Originally Posted by ashbypower
The Tell tale is just that an idication of water being pumped. What you have is a pressure gauge far more usefull. You dont have to look round to check water flow
...As long as the pitot opening in the foot doesn't get clogged...
Heard tell of several people showing good water pressure while powered down and out of the water. Usually attributed to junk clogging the pitot opening while pressurized.
Whoops. Sorry; was thinking of a speedometer. I do recall someone having false cooling water pressure readings, but don't now recall what caused it.