12v or 24v gauges?

[ALMike]

One of my tempature gauges went out on my 2001 SB 400 (twin cummings). I meant to look at the back of the gauge to determine if it is 12volt or 24 volt. Can anyone save me a trip to the dock tonight? I want to order one 1st thing Monday in hopes of fishing this coming weekend.

Thank you!
Mike

 

[bigcam]

12v