I'm not familar with your engine...but if there are models with electric start all you'll need is the starter...a simple solenoid...a switch, cables, and a battery. Would not be hard at all. Finding a starter that will fit would probably be the toughest thing to do.
"But if serving the Lord seems undesirable to you, then choose for yourselves this day whom you will serve, whether the gods your ancestors served beyond the Euphrates, or the gods of the Amorites, in whose land you are living. But as for me and my household, we will serve the Lord.” Joshua 25:15