Cooling Water Pressure Sensor

[DennisCark]

First time user.
Yamaha F300UCA mfg Date 7/1/12 with Command Link Plus Multifunction Gauge.
Speed Sensor and Cooling Water Pressure Sensor kit has been installed.
The water pressure gauge reads all the way to the top (H) with the key on but engine not running.
With engine running it stays there and sometimes it is all the way to the bottom (-).
280 total EH and 80 since impeller replaced.
Is this a defective sensor? Is ther a way to check the sensor?
Does the Command Link Display need to be reconfigured? What sensor do I need ot order?
Thanks so much for your help
Dennis

[TownsendsFJR1300]

Has it ALWAYS been this way or did it work properly before???

(Also, is the boat/engine "new" to you?) -As in NEW to you, or your first post here?

[99yam40]

First time user.
Yamaha F300UCA mfg Date 7/1/12 with Command Link Plus Multifunction Gauge.
Speed Sensor and Cooling Water Pressure Sensor kit has been installed.
The water pressure gauge reads all the way to the top (H) with the key on but engine not running.
With engine running it stays there and sometimes it is all the way to the bottom (-).
280 total EH and 80 since impeller replaced.
Is this a defective sensor? Is ther a way to check the sensor?
Does the Command Link Display need to be reconfigured? What sensor do I need ot order?
Thanks so much for your help
Dennis

maybe a better explanation is in order

[TownsendsFJR1300]

maybe a better explanation is in order

280 Engine Hours, 80 hours since WP impeller

Don't ya love abbreviations?

[99yam40]

I should have figured that out, but lost it