Search:

https://www.lockettluresoutlet.com/16snakeworm.html

Here you go.

https://youtu.be/ZPTzkep9xlI

This is the easiest way to tie the FG knot for me.

Main fuse inside the motor.

Call Merc direct. I have had great response from their CS techs.

Would like to see you transom mounted transducer location, if you have one.
My float pods make mounting trans. a PIA.

Seems you are getting a voltage drop to the console unit. I had the same problem with initial install. Run proper size wire direct to battery with inline fuse and you should be good to go.

I have the same motor and my throttle linkage was off a little bit.
Also if the leading edges of your impeller are dull it can rob performance.
While your looking at your impeller might want to...

I have one. PM sent