Bridging material removal
On metal hulled vessels, to prevent galvanic corrosion, the metal parts of your stainless steel transducer must NOT touch the hull. The included high speed nose cone and isolation parts ensure a gap exists between the two surfaces.
When cleaning your transducer, particular attention must be given to the edge of the high speed nose cone. Ensure that there is no growth or material attached that bridges the gap between the metal part of the transducer and a metal hull.

Metal part of transducer.
High speed nose cone.
Metal hull.