walleyeeddie Brainerd, MNPosts: 3 November 22, 2019 at 6:10 pm #1892778 Can you tell me what the blue clamp is on your marcum and transducer?
mahtofire14 Mahtomedi, MNPosts: 11036 November 22, 2019 at 6:29 pm #1892780 It’s the Ice Defense pump. It runs off your flasher battery and pumps water through the blue piece on the transducer cable keeping your ice hole from freezing. There are a couple of threads on the site that talk about them more in depth.