Hello, I have 1996 four winns 195 sundower dxl that was put away badly. i have cleaned up and trying to get motor going. i have it trying to run when i first start then dies when in the on position of the key. i have tested and i do lose spark when key is off the start position. what should i be looking for? key switch ? oil pressure sensor? it has had lots of moisture and i have cleaned up some connections such as neutral cable and gas sending unit so dash does work. thanks for any and all help.