My old fish / depth finder died so I bought a new Garman 204 Blue unit. The old tranducer (200 watts) was mounted inside the hull and worked fine. The new Garman unit (500 watts) will not give me a reading after mounting in the exact same spot the old one came out of. The area was cleaned,sanded and installed with epoxy. I dropped the transducer overboard prior to mounting and it gave me a good reading. My boat is a 1991 SeaRay 27 Sundancer. Any suggestions or explanations as to why the old 200 watt transducer shot through the hull and the new 500 watt one won't?<br />Thanks
