Hi Keepokeeponon,
See file attached.
This is what I did through advice from guys on this great forum
1. Go to an electrical/computer store and buy a switching power supply 240v input and 12volt output, Fuseable with a female socket.
2. Buy from Humminbird Pc-11 cable (power lead for head of your HB.).
3. Buy male end to plug into female socket and join the red and black wires to the HB cable. (red to red, black to black)
You will not get GPS or transducer naturally but you can learn heaps from this set up sitting in your living room.
This setup is how and looking at this forum I learnt my 898 HB
Your switching power supply might be slightly different in the US as long as it has 12v output
Geoff