Marine electricians

[Gill-T]

I am looking at replacing my dated Boat gauges as I look to redo my console. All gauges work so wiring and sending units are working. Questions:  

1.  Can I just replace old gauges with new?

2).  Do I have to replace sending units also?

3). Do I have to make sure the ohms is the same with the replacements?  

4). What am I missing?

[Zinger11]

I am looking at replacing my dated Boat gauges as I look to redo my console. All gauges work so wiring and sending units are working. Questions:  
1.  Can I just replace old gauges with new?
2).  Do I have to replace sending units also?
3). Do I have to make sure the ohms is the same with the replacements?  
4). What am I missing?

Just replaced my gauges with all new ones bought on Amazon. Pretty simple swap. Marine wire colors are standard between manufacturers if you run it to any issues so to answer your questions
Yes
No
Yes
Nothing


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