Editied 5/18/18 to include Required info:
1. 2B181067
2. 2016 Ranger 1850 LS Reata w/ Merc 150 Four Stroke
3. Tempest Plus 19P
4. 5600
5. I can't remember Idle and WOT H2O pressure, but probably not relevant to this post
6. SC-1000 System Tach and Speedo, as well as SC-100 Oil Pressure and Engine Temp System Link Gauges.
I have my HDS Carbon 12 Connected to my Mercury SmartCraft SC-1000 Speedometer, Version 7.0, via NEMA 0183. I have Carbon 12 configured to output NEMA 0183 at 4800 Baud, and sending only RMB and RMC Sentences. This configuration successfully sends Navigation Info to my SC-1000, allowing me to tap into several interesting fuel management, fuel to waypoint, and other functions of the SC-1000 speedometer. Most importantly, it also lets me read GPS speed on the speedometer. All of this works perfectly. confirming I have the proper electrical connections (I wired this up last year with advice from an online source NEMA 0183 + out of Lowrance to NEMA 0183+ on speedo; Shield on Lowrance to NEMA 0813- on speedo and both shorted to vessel GND).
I am having one problem that is NEW since the Lowrance Fish Reveal upgrade. The SC-1000 speedometer clock had been configured to update the time from the NEMA 0183 GPS input (In the Calibration Menu, it is a choice for time). Before the Fish Reveal Update, the time on my speedometer was updated perfectly as soon as I turn the key on, if the HDS was on. After the fish reveal update, the SC-1000 Speedometer still reports "Time Updated by GPS" but the time is set to 16:60 on every power on.
My Father-In-Law has HDS Gen 3's on his boat, with Mercury Smart Craft SC-1000 speedometer running SmartCraft V3.5, with the two connected via NEMA 0183, and he is experiencing the exact same issue since updating his HDS Gen 3's to The Fish Reveal Update. His time function worked perfectly on the HDS firmware previous to this level as well.
It should be noted, that before I bought the HDS Carbon, I had Lowrance ELITE 7 CHIRP Connected to the same SC-10000 speedometer, outputting RMB/RMC NEMA0183 sentences and the time was properly updated.
It should also be noted that all other NEMA 0183 INPUT functions to the SC-1000 Speedometer work (ie, Speed, Distance to Waypoint, etc). So, I know the connections are good.
I believe Lowrance must have a bug in the NEMA0183 RMB or RMC sentences as it relates to time. The situation is NEW with the update to Fish Reveal.
I did also update to the latest Fish Reveal + Patch 18.1 / 59.1.86 and saw no difference.
Has anyone else seen this issue after the update? It was so convenient to set the time on my SmartCraft gauge automatically, because the gauge loses the time memory after a few days of the boat master power being off.
I have a note into Lowrance to see what they say.