I recently bought new Teleflex Lido gauges.  I got the Tach and oil pressure to working, but I could not get the temp to read correctly.  I checked my wiring which is all new.  The Sender is a Sierra part, could that be the problem.  I wonder if the alumium Intake manifold is not allowing the Sierra Sending unit to ground.  Does anyone know if you have to have a Teleflex sending unit for the water temp? Thank you for your help.

Well I have a question for you guys.  Does anyone know how to correctly hook up the water to hardin marine headers.  Right now I have the water coming from the jet going in on the front bottom 90 degree on the headers then above that 90 degree is another outlet that takes the water to the water pump and last the water comes out of the inlet on the intake manifold to the rear of the exhaust outlet.  I think I have it correct but im not for sure.  Thank you for any help you can provide.

Robert