Join Date: May 2006
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You will find it difficult to find a suitable position to mount an in hull transducer in a sail boat. Normally they are limited to a deadrise of 20 degrees and you really need to be installing the device forward in the boat and not have any thru-hulls/intakes or anything that will cause turbulance forward of the transducer position.
There are 2 types of transducer offered as in-hull, a basic Puck that is epoxied onto the inner hull and a tank type. I recenly installed a tank type in a Morgan, to acieve the angle required an additional tank extender was built with an aditional angle cut to achieve an overall angle of about 35 degrees and thus have the transducer firing directly under the boat.
Note: If using a tank type transducer, DO NOT use mineral oil as the tank fill medium suggested by Humminbird, it will eventually cause the bond to the hull to fail. Use RV Antifreeze in place of this, this is now wahat Airmar recommend, particularly if using 5200 as the bonding compound.