6.4" - It is the HDS-7 Lowrance. I think Vessel View is a sweet setup but $1100 and a lot of dash space, they make a stand alone gauge that will allow me to link the Merc output to the Lowrance, I think. The trouble is I am unfamiliar with the Optimax, I am not sure if the 2003 is even compatible with the new Vessel View. Service manual is on the way. I won't be in the dark for long but in the meantime,
CAN SOMEBODY CLUE ME IN ?
I got to looking at the engine harness. Looks the same as the harness on the boat that dates back to the days of carburetors. Is this a plug and play with my current harness and have all my manual gauges work? Obviously limited information for now, until I install a secondary harness to parallel the engine harness and connect some sort of Smatcraft Gauge. Is this right?
AND Spareparts, if you got the Tach and Speedo gauges, we need to talk.

BTW, I ordered a few missing items, gaskets and a shop manual from Merc, and the Merc man brought out his defribulator upon giving me the bill. My wallet thought I was at the Yamaha shop.

