Depth Finder Issues

[Goooh]

I have a couple issues in hoping y'all can give me some advice on before I bring it in.

1). When I'm running my depth will go blank for no reason. It happens randomly in shallow water, or when running a deep channel in 30-40', clean water or dirty

2) my trolling motor mounted transducer gets pretty out of whack on my bow unit when comparing to the reading at the helm. The difference can be 4-5' so I know it's not just the depth difference between the transducers. Main unit at the helm is accurate, bow is way off when I do a quick dip with my pole. It's not constant either, it will just fluctuate.

Have an HDS10 at the controls, HDS7 on the bow.




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