This question if really more out of curiosity then anything. I have a 52" Snapper hydro walk behind mower. It has a 16hp B&S Vanguard on it. Recoil start. Lets say I wanted to upgrade to a 20hp B&S Vanguard. First off all, I assume this is possible? Secondly, I see that they offer it with recoil or electric start. Could I go with the electric start model, and if so, what else is involved in making that work? Just add a battery? And I guess some sort of ignition button? (please excuse any lack of correct mechanical terminology, I just run the mowers, I don't really work on them).