I once had an issue with the depth finder, and all I did was wipe the hull mounted transducer with a wet rag - this was a couple years ago, it's been good ever since. As to the depth readings, remember that the transducer is mounted towards the rear of the hull, but not at the lowest point. The meter itself has a feature that lets you adjust the offset from the keel at the display - this could account for the difference in depth versus a fish finder.
_________________ 2007 Horizon 200
4.3L GXi/ SX 225 HP
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