A mounting system for attaching a transducer to a surface such as the transom of a boat hull is disclosed. The system consists of a mounting block, fasteners, and an item that the installer wishes to attach (such as a transducer or plate). The block is formed of corrosion-resistant material. The block has an adhesive layer that bonds the block to the surface; no fasteners are required to mount the block to the surface. The block has at least one T-shaped slot that retains corrosion-resistant fasteners, which anchor the transducer to the block when the fasteners are tightened. The adhesive layer is protected by a removable layer that is peeled away just prior to pressing the block on the transom surface.