Water Pressure for 1993 115hp

[Knot_Enuff]

I just installed a water pressure gauge I had and it goes to 30 psi. While trying it out this past weekend it sprung my gauge. What is the range for this motor? At idle it is putting out 15psi. Does this sound right?? My merc only puts out 5 psi at idle and about 15 at WOT.

Thanks for the help!!

[boats.net]

No a Yamaha water pressure gauge with sender tubing installed in the block want read anything at idle and 10-25 lbs at wide open