My OMC sterndrive won't start it's not even turning over? I just installed a new alternator and starter and reverse cable and it ran fine prior to doing all the work? I checked for grounds but no luck. I had bilge/blower power then when I turned the key nothing and it killed any power to bilge/blower. But I have had tilt/trim the whole time? Is it the neutral cut out in the? Any insight would help..