More on the code 25 water pressure switch

Welcome to CSR!

Those PSI numbers look good to me. Is there a problem you are chasing?

 

That sensor is a $100 plus dollar pc. of crap, prone to failure. If it's not alarming and reducing power your good to go. Don't get concerned with the numbers, if it's not overheating

 

Don't know about a boat of your age, mine won't do that. Reduces power by 11 % thru the entire rpm range

 

Seems like that is a circuit code as opposed to a high or low pressure code.
file:///C:/Users/Kathy/Downloads/512au5re9znf.pdf
Try to induce the opposite or different code by unplugging the sensor or jumping the sensor wires.
How many wires does the sensor connector have?

 

I believe Mitch is suggesting you are getting an erroneous code. By unplugging the sensor you definitely should get another code but I'm not sure how that helps.

That said....code 25 is: Sea Pump Circuit Lo shows up at 90% power and allegedly is a Short in the Water Pressure Circuit. Most of the time replacing the sensor solves it because the sensor does not produce the voltage expected at a given rpm. That said....check the wiring going to the sensor and the connector.

Also.....did your mechanic check for a software update? I seem to recall some sensor calibration issues that they addressed with later releases.

I agree with @scoflaw that the sensor is problematic.

 

Just spent similar money on OEM and it only lasted 15 hours. Went with a $15 Chinese knockoff, it's not accurate but it keeps my PCM happy with no alarm or power reduction.

 

I’ve had that OEM water pressure sensor be bad when new, out of the box. They are troublesome. I was able to return it as defective.

 

More on the code 25 water pressure switch

Where are up getting this code 25 with a scanner of vessel view?
What audible alarm are you getting from guardian alarm, constant alarm or 2 beeps once per minute.

 

Sounds like it is a Overheat in port or starboard Exhaust Manifold Coolant Temp (EMCT), 212°F (100°C)
limit
NOT pressuse but flow related. there are two other sensors on exhaust manifold.
use a scanner on the engine it will show much more info.

 

My scan tool lists my engine's block water pressure norms to be between .5 and 15 psi (assuming .5 at idle).

 

Freeze frame data with a scanner will tell you exactly what's going on.