Hello! My 35 Marlin CC has 380 K-Planes but have no dash indicators as to their position. After having Formula boats all my life, I miss not having an indicator. Is there a way to add those after the fact?

There's a position sender there - the circular black object with wires - so you need to find a gauge that is compatible with the signal that's being put out. It's a 3 wire sender so that suggests it's a digital sender, which means a Smartcraft to NMEA2000 setup should be able to display the tab position for you.

Looks like you have the senders already. What engines do you have?

Ok, I was wondering if that's what those were.

2013 Verado 300's. The information runs through standard verado gauges and 2 Lowrance HDS 12, Gen 2 Touch Screens

So, do you have Smartcraft data available on your Lowrance screens? (Can you see engine parameters such as temp, volts, etc?)

Yes, I can monitor all engine functions etc from each display. I can see engine trim, but not tab

OK, so if we're going to assume / hope that those existing senders are actually connected and delivering data to the smartcraft module, then it's just a matter of adding that data to your display. You'll have to go into some setup screens and I don't have familiarity with your Lowrance unit to walk you through it exactly - but there should be somewhere where you can choose vessel data such as fuel tanks, trim tabs, water tanks, etc. Then it's just a matter of checking the boxes correctly and you should have tab indicators shown on the data screen.

Thanks, ya'll ! I will check it out when I get home and report back!