Water Pressure Sensor Alarm - what is repair?

[Covedog]

I'm getting an intermittent alarm for the starboard engine on the smartcraft display: "water pressure sensor not working properly". I've notified my mech and he's chasing it down with Mercury Marine but does anyone have input on what and how long it takes to correct?
I'm leaving on a big trip mid next week and hope to get it fixed by then, although I assume engine will operate fine if not fixed - just have to listen to sensor alarm off and on the whole trip.

 

[Drifter85258]

I'm getting an intermittent alarm for the starboard engine on the smartcraft display: "water pressure sensor not working properly". I've notified my mech and he's chasing it down with Mercury Marine but does anyone have input on what and how long it takes to correct?
I'm leaving on a big trip mid next week and hope to get it fixed by then, although I assume engine will operate fine if not fixed - just have to listen to sensor alarm off and on the whole trip.

Just replaced mine. Part is just over $100 and takes about 5 minutes to switch out. Switch them between engines to confirm it is the sensor.

 

[Covedog]

where is the part located?

 

[Drifter85258]

where is the part located?

mine were on the front of the engine as you look down. I think on the transmission oil heat exchanger. Wire connect on the top, brass bottom / nut. Others are back by the water pump.

Here is link that shows one at the water pump (see part 12) and $126
http://www.boats.net/parts/search/M...319191 THRU 0W089999/Seawater Pump/parts.html

 

[mygirl]

Front

 

[Covedog]

So by front you mean forward side of the engine looking down at the heat exchangers for the V Drives - correct?
And with V Drives, the water pump is on the aft side of the engine?

 

[sdleo26]

If that sensor is/was bad, you would be going into limp mode... no rev over 1200 RPM... is that happening??

 

[Emagine]

On the 6.2 it is screwed into transmission cooler right above the transmission which is on the back of the engine, which is towards the front of the boat because the engine is installed facing aft due to the B drives. When you open the hatch look straight down just behind the bulkhead on top of the transmission you will see the cooler with the sensor screwed into it.

 

[Emagine]

Correction the "V" drives. I think it's the same on the 8.1

 

[Covedog]

No - engine appears to run normally. Sensor alarm is also intermittent. Initially, it came on after the boat was at rest for a while after a run. Next day, started the boat - no alarm until about 20 minutes of operation. Then, alarm came and went intermittently.