I installed my power cable with filter hummingbird sent me but didn't help, They try to say it is settings which it isn't,they never heard of such a thing.
I will try to explain my system better, my 899ciHdsi combo is on the front of my boat reading from my transom si transducer and my settings are reading off that . Ethernet cable goes to the Ethernet box to my helix10sonargps,my settings read off my 899 except for 2d which runs off transom mount 2d, also a dual beam cable runs from my 899 to my trolling motor. si and di work great on my 899 but a bit blurry on my helix 10 plus chart speed doesn't work on helix si. when I drop my trolling motor the di si and chart speed work perfect on helix So when driving my boat I have to drop trolling motor to get good readings on helix. No one seems to have a clue whats wrong . It makes no sence that putting power to trolling motor helps but taking off blurs my helix 10,and does not effect my 899 either way