367 Universal Fishfinder Mount for Up to 9" UnitsFeatures:. The Scotty Universal Sounder/Fishfinder Mount uses a new multi pattern universal top plate and the Scotty post mount design for quick removal and adjustable rotation. Simply fasten your sounder bracket to the top plate, then lock down the sounder mount into your favorite Scotty post mounting system. Only intended for use with Fishfinders and other marine electronics