No power to port motor

[austinmartin]

I have a 1989 SeaRay 280 with twin Mercruiser 5.0 MPI's (installed 2010-150 hours each) with alpha ones. The port motor is a bit of a problem child- the latest issue is that the motor is receiving no power. When I turn the key there is no dead battery click, the fuel pump doesn't prime itself nor does the blower run (blower ran off that motor). Starboard runs like a top. Port side I installed new ignition switch and fuse, new battery, new Perko, traced all lines accessible between the motor and battery, and battery and helm for ground disconnects or other loose wiring. I have played with the throttle/shift controller and do not believe it is a bad neutral safety switch on the port control (single action-shift and throttle in one). Does anyone have any ideas? I am essentially electrical illiterate and wanted some advice before I took it to the shipyard. It ran strong last weekend and then suddenly this issue arose.

 

[Bt Doctur]

Check for battery voltage at the alt output post, if none check the starter for a whitish, square plastic block. A fuse link the is most likely bad. Can test with a wire from the + battery to the Red/purple at the slave. This should liven up the gauges and allow the key to operate the starter

 

[QBhoy]

Do you have twin throttle remotes ? What’s the set up with the kill switch lanyard on your set up and when the engines were installed, was it properly wired to suit (if you have a combined remotes system with just one kill switch. Just a thought.