Water pressure gauge. install ?

[Airpacker]

rear corners of the intake where the heads are blocked off is a good place to install them. Drill, tap 1/8 NPT and install fitting. Use a shop vac to grab drill cuttings and grease the tap before using. Using the holes low on the block at a drain can allow rust precipitate to plug your gauge lines.

[old377guy]

I love this board, I file this information away for future re-rig projects. - Jeff

[Pismo10]

I would like a water flow gauge more than a pressure gauge. Flow is what cools the motor. You can have lots of pressure and low flow, like an outlet obstruction. You can also have lots of flow with fairly low pressure. They aren't necessarily directly related. Expensive tho.