Several weeks ago I got prop stuck in rope. I tried to restart the engine when I think it was still in gear, before I noticed the rope. After trying to start engine after removing rope engine would not start. The engine is a Chev 305 merc model 228. The battery has 13vdc, I heard a single click when the key was turned on. I checked the voltage at the starter sel it was 12.5 VDC. I replaced the starter with no joy. I heard what I thought was a louder clunk noise from the starter. Now when the key is turned there is a continuous clicking noise. Help