Have a 79 25hp Evinrude manual start and wanting to convert to electric start. As simple conversion as possible. I have a starter and bracket but nothing else. Not sure what all is needed for conversion. I'm thinking starter and push button start switch. Does not have to charge the battery as I will have on charger when not in use. Not sure if a solenoid is necessary or not. Pos battery wire to button switch and from switch to starter is all I'm thinking is needed. Any help is appreciated.