Having probs with my new 1197 where the screen fills with interference at about 25 MPH, I am sure it has something to do with the rivets on the bottom of my 19ft Sea Nymph, (model 195TC) so after inintial mounting of tranduer, it was a .25" above the hull bottom and so I moved it all the way down so its now about .5" below the hull with no difference at all. Before I turn my transom into swiss cheese, any thoughts on if I should move it higher above the hull or lower which i hate to do since I primarily fish Ohio River tourneys and am always plowing through huge logs and drift.
I am sure many others have had this same problem so if you did, what did you do to fix it?
Many thanks, Salmonid