water pressure

[dreamchaser]

Cheers All, summer is here ahhhh!!! Well just installed my new water pressure gauge, along with a new complete water pump kit , new stats to .The motor is a 94 120 johnson 2 stroke, it is t,d into the thin water hose comin over from the port side, just below the starboard lower plug hole I think its no. 4. water pressure is reading 12 at idle , Is that an acceptable readin ? thks .and happy boatin ....

 

[HighTrim]

Re: water pressure

As far as I now, there aren't any factory specs for water pressure so you have to make your own. Any deviation from them and you know you have a problem. I'll take a water pressure gauge over a high-temp horn any day. Just gotta remember to watch it. Other than that your numbers sound about right, so if they start fluctuating youll know you have a problem, gl

 

[mrtool2u]

Re: water pressure

I have a 93 Johnny 120 and I average around 8 at idle,and 25 at WOT. I have not put a new pump in for a few years,so this could explain the difference. How does that motor run,what size/kind of boat do you have it on. My motor is a house.

 

[Silvertip]

Re: water pressure

The ideal way to install a water pressure gauge is to also install a new water pump. Then note the idle and wide open throttle water pressures. Down the road, any deviation from those numbers provides an indication something going wrong.