40 horse Mercury outboard 1992 can I change amperage output

[jandaderifield@gmail.com]

I want to up the amperage output of my 40 horse outboard Mercury 1992 model stock is 9 I want to go to 20

 

[Faztbullet]

4 or 2 cylinder?

 

[jandaderifield@gmail.com]

Four cylinder

 

[Faztbullet]

Sorry but no....