Did they even connect the tanks to the zuke harness?
If you still have the old dashboard fuel level Main/Aux switch you have to disconnect that and run the sender wires to the zuke harness.
The Mechanical zukes have a special wire harness to the SMG4 gauges. The gauges do not have all the functionality of those connected to Digital motors.
IDK what is different.
Its been a long time since I setup the tanks. I had to do it because I had a bad sender in one tank so the dealer could not get it setup.
I seem to remember that you needed to do something to get to the "dealer setup" menu.
There is a required setting for the US or Euro senders. There are settings for naming/numbering the tanks.
Ha! I walked outside to go in the boat to get the SMG4 manual and the boat's not there! I launched yesterday!
I know they are now shipping Generation2 SMG4s. Unless they made a change to the SMG4s, "calibration of levels" is not necessary. It will just display a linear percentage of the range of ohms for the sender (US or Euro).
When you say Have not fuel tank readings" you mean there are two tanks displaying no bars or do you mean you have no fuel tank display at all.
There are Menus for doing setup. Once you are done setup you never use "Menu" button again. In the menus you can setup the "SCREENS" to look the way you want. There are 4 SCREENS.
Some can be set to look analog or digital or OFF. Fuel SCREEN can be set ON or OFF. Initial Settings Menu lets you setup Units & formats ..
The SET button scrolls you thru SCREENS. Each screen has Sub-Info. You use the ^ v arrows to scroll thru Sub-info on each SCREEN.
Holding either arrow for a long time resets TRIP and Fuel Used . REMEMBER...Do that every time you gas up! Then you will know how much you have burned since you gassed up.
I use the All Items Display Screen for both gauges. The fuel gauge on that screen is COMBINED tanks. Then use the SET button to look at separate tank fuel levels.
Use ^ v arrows to see "Total HRs (Engine hours)", trip hours, trip burn, economy , etc