and how will you charge the battery? probably not worth it for such a small engine, just wrap a rope around the starter cup and pull. It will make you appreciate a well tuned carb haha.
We had an old gravely, with a 7hp cast iron kohler, this thing looked like ****, and every time you had to start it you would wrap an old leather strap around a little cup bolted to the flywheel, and pull, we never cleaned the carb or drained the gas, but this thing always started up second pull.