Sea Ray

Thanks, will def check it out. Mercruiser tech recommended changing the impeller since we have no record of maintenence or last change. Old marina where boat was unable to provide he due to change in computer system. Which is crap. Tech says sensor is working if getting alarm. Not worth chancing it

For what it is worth, the Mercury SmartCraft Engine Guardian System is, how should I say it, finicky or even persnickety. My water pressure senor goes off if I am in reverse at the lowest speed and sometimes in forward gear at the lowest of speeds. But, the impeller is fine and good water flows through at all other RPMs and situations. I just live with it. Additionally, my sterndrive oil reservoir sensor went off with a full bottle, just because the wire lead coming from the sensor got jarred loose. Jiggled it back in place and everything was fine. Sometimes you end up chasing a sensor sound with extreme solutions when merely checking the connection will do. Remember, boats suffer a lot of vibration and surf pound. Things get loose. For what it is worth.

Sounds good. Thanks for the info. Just concerned due to lack of history. I will definitely look at the wires. Thanks for the tips.

I had to change the "poppet valve" before the low water alarms stopped going off. Cheap part, easy fix. Good luck!

I sounds like low pressue fron the raw water pump that provides engine cooling water.

Update, we replaced the sensor and seems to have solved the problem. Water pressure reading about 9.0psi while running 15-20 mph. This boat had a problem with this sensor in the past. Thanks for comments.😁