Mercruiser 8.1 Mie water pressure sensor mounted in drain hole on pump

[Bigh212]

Help! I broke the adapter that my water pressure sensor screws into. The pressure sensor was screwed into the drain hole of the pump and there is no 1/8 plug in on my pump to fit it directly. Does anyone know what size adapter to get. I’m guessing this is the old stlyle as the new style has a Speedtest mounting area for the water pressure.

 

[Fun Times]

The blue drain plug is 500-13 so the sensor threads are the same size if I recall correctly.

See item number 8 and 10 to see if it helps at all, http://www.mercruiserparts.com/bam/subassembly/31675/7460/210

 

[Bt Doctur]

another job to replace with resistors, with a proper maintance schedule and watching the engine temp gauge those sensores are useless.

 

[Bigh212]

The first diagram is close to what I’ve got. However under the link you sent the picture depicts the sensor not in the drain but rather behind it. Not sure where you got the first picture but I’d hope the adapter is shown with the first diagram