Hi Cap'n, I upgraded the Tach over the winter. To preface, I am a techie who loves these types of toys. My starboard tach was acting up and the tap fix was no longer working so after a bit of research, the SC1000 Tach is a direct fit into the Merc network on board. It still has a normal analog gauge style tach so I still have that visual but it also give so much more info regarding battery voltage, temp, fuel flow, trim indication, etc.
They fit perfectly in the existing holes and it was a 1 wire hook up to each unit. I will post a picture after this weekend.
http://www.mercurymarine.com/gauges-and ... 000-sc100/I still have the old ones on the shelf if you are interested in them. (Sorry, the mechanic did not mark which one was starboard)
As far as Raymarine talking to Merc, I investigated that route when we bought the boat but as I found, the two universes don't talk well. I have the C80 which I know is not as intelligent as the E series. This upgrade gave me almost all of the SmartCraft info without the huge expense.
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Jnizi
2007 Vista 338 "Better Yet"
Previously:
2007 Vista 258 " Just Right"
2005 Horizon 230