The trolling you do all day ? Then you think your loading up with carbon on the top of the piston, so every hour or so are you burning it off ?
There should be no filter inline after the pump except in the fitting that enters the carb.
You could install a fuel water sep. before the pump. If you don't have one already.
Fuel pump is giving you what psi ? 4-6 no less 7 ok no more. The clear hose to the carb have fuel in it ?
You dumped alot of stuff in the tank but your not giving it a chance to run all the stuff out of the tank, you want instant results.
Keep cleaning the filter in the fitting that enters the carb and keep pulling the fuel pickup tube, and checking the anti-syphin valve for good operation, and keep the vent clear, and give it a chance to work the stuff you keep dumping in the tank.
I never add anything to the gas.
This new gas is giving everyone a problem , it scrubs your tank clean, the fuel line gets eatin if older, and all kinds of stuff, you just got to keep all the filters clean.
And this is assuming that it's fuel related, and you checked the grounds and the cables and the motor is tuned right, and your getting good spark, the dist is working right.