water pressure guage

[beach]

Im adding a pressure guage and need to know if the guage needs to read to 15 or to 30 psi.<br />69 105hp.

 

[roscoe]

Re: water pressure guage

15 should cover it.<br />Most older and many newer engines only produce 10-15 # of pressure. 2-4# at idle.<br /><br />A 30# guage will definitely work though.