I have a 1982 OMC 3.0 - 140hp. I can't start it only with the key. (I don't even ear explosion) But when I disconnect the gas control from shift cable and play with the gas control and the choke control directly from the carburator during the ignition (with the key) the motor start with no problem. After I reconnect back the shift cable with the gas control and everything works fine.<br /><br />I think the automatic choke is the problem...