You've got to run an airline hose from the back of the gauge to a place on the motor where you can T off of the hose leading to the pee hole. That hose will then carry water and some air back to the gauge. The air will be trapped between the water and the gauge and will indicate the pressure on the gauge. I use mine quite a bit on startup just to make sure I have good water pressure. I have a partyhut 30 and my motor and the pee hole are not easy to see from the helm so the gauge is very helpful. Good luck!
Every 2 stroke needs such a gauge. You don't see'em on 4 strokes, however.
Every 2 stroke needs such a gauge. You don't see'em on 4 strokes, however.