depth finder/gauge

My boat is a 1989 Sea Ray 160 BROB. Looking for advice on better installation of the existing inboard depth transponder. It is currently just siliconed to the bottom of the hull near the bilge pump at the transom. Depth gauge is not giving me any true readings. Not certain if the bottom of...

I have a 1985 sea ray and built into the dash is a impluse depth finder. It is two inch in diameter and on the front of it, has two control bottens one has word up and the other has word down on it. I would like some information on how to operate it. If you have some please send to me thank...

Any suggestions into which brand to buy/install. Unfortunately this was the only option my boat's previous owner left off the list. Are the only options "thru Hull" and "transducer". I would LOVE to NOT do any drilling..... Thanks, Chris

went out last weekend and depth gauge seemed to keep alternating between between 1.3 and 3 feet started suddenly did not hit anything in the water or scuff bottom could the sensor on the transom get dirty or short out is it easy to replace or clean thanks for any advice