Im restoring the motor mounts and floor boards on a 1988 Marlinc mercruiser that has been sitting outside halfway covered for 12 years. I am about ready for the new floor boards and decided i wanted to make sure i wasnt going to have engine issues. I hooked up a battery and all i am getting is a click at the circut breaker on the eingine. I changed out the starter relay to see if that was the issue, still getting the click. If i bypass the starter relay and connect strait on to the starter the start will spin. I am new to boats and am not really sure what to do next. Any help would be great thanks guys. Also all other electronics work. Lights, Bilge and blower.