Fuse

[Sabatti]

1871f has no fuse on power cable, 1870 has 3 amp, so
is the 3 amp ok for 1871 and best memory storage for micro sd sim card.

 

[Johnny Electron]

When fusing or establishing a breaker just for the GP1871F, I would recommend 2 amp for 12v operations or 1 amp for 24v operations.

 

[DenisBajic84]

When fusing or establishing a breaker just for the GP1871F, I would recommend 2 amp for 12v operations or 1 amp for 24v operations.

what size battery should I use when using a 1kw transducer ? 12v or 24v ?

 

[Johnny Electron]

Either voltage will work on that unit. At twice the voltage it will use half the amperage. Most people wire it to the voltage that is nearest or most convenient. Many smaller boats only have 12vdc. Those that have both voltages get to choose which to use. The NMEA 2000 bus can't use 24v as the standard on that is 9-16v. (most people use 12vdc)

 

[DenisBajic84]

Good to know. Let me ask you another question. I was out today using my Furuno 1871f with the TM185M. I was expecting better feedings than what this pic shows

 

[Johnny Electron]

Because you didn't start this thread if you want to discuss your sounder, please open your own thread. The OP might not like his thread hijacked.