Hello, i have a 1995 Sea Ray 200 signature select every time i try to turn the boat over all i hear is a click, i have tried to jump the boat and with a 600cc battery electronics work no issue but the boat wont crank, the boat has been sitting for about 4 years i tried and can spin the crankshaft to a certain extent with some effort i have replaced the spark plugs, starter and ignition and im stumped on what the next steps would be any suggestions?