Raw water PSI jumps up off charts

[rwf]

Almost got to the end of the season and now this.

Got to use the boat after 2 weeks, and port side raw water pressure PSI jumps to 15 pounds while starboard is still 1.5 pounds at idle. Mercruiser & Bravo 3 drives.

Sounds like the water outlet has something growing in it. I'd like to know if there is a usual place this happens before diving in. Any thoughts?

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[scoflaw]

The 1.5 is the normal idle reading. 17 is about normal for WOT

 

[tbirdvet]

I had the same issue. It was a bad sensor.

 

[Jaay757]

Just a bad sensor, common problem..

 

[rwf]

Yep, I know about the bad run of sensors around 2008. Both of mine were replaced with the new design in 2011.

So do people still think it is the sensor, or a clog?

Rich

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[Jaay757]

I would switch the sensors to confirm this is your problem. With the ignition on, the motor off do u still get a false reading? I had one reading 30psi at idle and 30psi with just the ignition on. It was just a faulty sensor.

 

[kaz911]

Where I am the sensors are "consumables" - 1 every year pr engine. Those sensors are not worth the metal they are manufactured in. Other consumables are engine mounted water pumps and digital trim senders for B3.

 

[Madifonzo]

X2. Same issue and replaced mine a few days ago.

 

[rwf]

Yep, last time I was at the boat it was 28lbs before I started the engines, so definitely a sensor.





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