I have a 798 CI SI.
I put it on my kayak and I have about 8 foot of wiring from the battery to my unit. I used 22 gauge wiring because it was close to the same size as the power cable that came with the unit, it looked like it to me. I have the inline 3 amp fuse, I also have a mercury tilt switch in line also, just in case I were to turn over, to keep it from shorting out.
I have read some of the discussions on this forum about wiring for units. It has got me confused and concerned now. My question is the wiring that I used OK? Or do I need bigger wiring. I have nothing else connected so interference shouldn't be a problem. My battery is an 8 amp hour battery.