Garrett and All, << Cut out the bottom of a plastic sandwich container and silicone it to the hull, place the transducer inside and fill the container with water. Snap the lid on and you're done. Works perfectly. >> I once used a more robust method - a 4" PVC pipe coupling with a screw-in plug. Using a portable 4" grinder, I shaped the coupling to match the sloped conture of the hull, and used 5200 to glue it in, and filled it with mineral oil. Mounted the transducer in the plug and drilled a hole off to the side for a self tapping screw with a rubber washer under it (this was an air vent). I put the plug into the coupling and then tightened the vent screw. This lasted about 10 years. Due to the ~35 degree slope of the hull, I could not just glue the transducer into the boat. The reason for the 5200 - this was supposed to be a temporary installation, but worked so well, I just left it. Wayne M/V Celestial Albin 43 Sundeck

Albin43Tr@aol.com writes: >I once used a more robust method - a 4" PVC pipe coupling with a >screw-in >plug. Using a portable 4" grinder, I shaped the coupling to Wayne: I once bought a Hinterhoeller 25 with exactly that installation. Wonder if it was yours? Nah, not likely because after about a year the oil leaked out and I had to re-glue the PVC pipe - and that couldn't have happened with 5200, eh? Ciao - George P.s: For fluid I used mineral oil "USP heavy" from the drugstore (that's laxative for most people).