Temperature sending unit interchangable..?

[Blackhauk90]

So, finally got my engine running smooth. The problem now is the hotter the temp gauge reads, the better it runs. The problem is by the time its at a steady temperature, it's halfway into the red. The thing i'm questioning is do the temp gauge senders typically run at the same ohms for all the gauges or is it common for the ohms to vary from gauge to gauge causing you to not be able to switch the sending units around?.. All the parts are off a mercruiser motor if that makes a difference..

 

[maxh]

Re: Temperature sending unit interchangable..?

it varies with each sending unit, if you look on the sending unit it should say what the range is... ie 12 volts 20-240ohms