Okay so I'm new here on the form and I'm at a loss .I am an automotive mechanic so I am mechanically inclined I am trying to figure out the issue with my boat, it's a 14 foot Boston Whaler and has a 80s Mercury 50 classic 45 horsepower on it .The problem I'm having is if I let it warm up and try to take off Full Throttle it will bog down and have full power bog down have full power the same when it's warm if I'm at Full Throttle it will lose power and then have full power lose power and have full power and less I am at 3/4 throttle, now things I have checked I have a new gas tank, new gas lines, clean the carbs, check the timing ,checked the trigger with the timing light put new plugs in it ,check compression ,I checked the fuel pump it looks to be in okay shape but I ordered a new rebuild kit and have not installed yet the CDI was replaced 2016 now one thing I have noticed was with the engine running it gets 12.2 volts I disconnect the battery in the engine only charges 2.5 volts I don't know if this is normal on a marine outboard or not.