Hi all. I'm new to this forum and to boating in general. My teenage son and I refurbished a 1978 16' beretta boat last summer. It has a 1974 850 Mercury outboard. When trying to start with the key it makes a clicking sound at motor. Trying to jump over at solenoid it does the same thing. Battery is fully charged and all leads are secure. Everyone has a way better clue than I about 2 strokers, especially outboards. So any info would be appriciated.