Amazon.com: Customer reviews: Garmin Echo 501c Worldwide with Transducer
Garmin 501c issues
Problems with my Garmin Echo 501c fish finder - YouTube
Amazon.com: Replace for Garmin 010-11678-10 Echo Series Power Cable 6 ft. (1-4/5 m) 4-Pin Power Cord Fit for Echo 100, Echo 101, Echo 150, Echo 151, Echo 151dv : Electronics