Connect SmartCraft SC1000 Speedometer Gauge to Lowrance GPS and Review 79-8M0135631 SPEED KIT.

This video covers the following subjects:
1. Content of the 79-8M0135631 SPEED KIT-80 BLK
2. Detailed review of 84 8M0055045 PZA SPEEDO HARN VR6.0 and 56-820386A76 TEMP SENSOR ASY
3. Can Mercury's SmartCraft SC1000 speedometer gauges read GPS from chart plotters?
4. How to connect Mercury SC1000 speedo gauge and your Lowrance unit to read GSP?
5. If we can read the GPS via NMEA 0183, can we use it to adjust the trolling mode using the speed on the speedometer?
6. Will the needle on the 80 mph SC1000 speedometer follow the km/h setting?
7. Can you use old taho cable for the new speedo?
8. Can you set the trolling mode in RPM on the speedo gauge?
How to connect 56-820386A76 TEMP SENSOR ASY to 84 8M0055045 PZA SPEEDO HARN VR6.0:
• How to connect 56-8203...

[@RJN82]

I just installed my new Lowrance HDS Live 9 and connected it to my Smartcraft NMEA GPS interface. My harness was well marked leading me to connect the yellow Lowrance wire to the white Smartcraft wire (matching your connections) and the blue Lowrance wire to the blue Smartcraft wire instead of the bare ground Lowrance wire you connected. It's great that yours worked though you may lose some noise immunity. I think your connection is similar to the old RS-232 single-ended (non-differential) interfaces while connecting blue to blue makes it like an RS-422 connection using differential signals to help cancel out noise. Thanks for diving into the poorly documented world of Smartcraft interfaces!

[@fishelectronics]

I'm glad this was some kind of help for you. This was just a test, I'm doing a winter project to replace all electric in the boat and I'm not quite sure yet that I'll keep the speedo as it's actually quite useless without the ability to set the trolling mode by speed without the paddle sensor which is needed for slow speed instead of GPS, and my engine does not support it.

[@RJN82]

I appreciate your efforts. I'm from the U.S. so I can't use language as an excuse for finding this installation confusing. I would think there would be more information directly from Mercury or Lowrance considering how many SmartCraft and GPS systems exist in the world. I'll be hooking mine up soon and your video is a great starting point. Kiitos!