BF 130 Water Pressure Gauges

What pressure are these gauges suppsed to measure - the same as water coming out of the pee tube?

They normally measure the water pressure in the block. On the 130, if I remember right, you have to drill a hole and tap it for a nipple for the water pressure tube. It has been several years since I did it, but I think there is a flat spot to the rear of the cover for the flush hose on the top port side rear of the motor. Part #7 http://www.boats.net/parts/search/Honda/Outboard%20Engine/2002/BF130A2%20LCA%20/CYLINDER%20HEAD%20COVER/parts.html

If you are asking, what amount of pressure should it read. It will vary from motor to motor. I normally tell customers, to note how it reads as they run it the first few times out. If there is a major decrease, then there is some sort of issue affecting the pressure.

Pressure numbers vary from about 15 psi at idle to 25 psi at full throttle. Pressure will be more in the water than when the motor is run on a hose.

Hope that helps.

Mike

Thanks Mike, I appreciate the input!