Speedway has a book for compleat instructions for 6- 12 volt conversion, It's 9 or 19 bucks I think, www.speedwaymotors.com , as for the engine not running, It's a carb problem. When old engines don't fire up after being run, 9 times out of 10, it's a carb problem yet, it could be possibly the points or somthing with the ignition system. when the engine is warm, and you are choking it to start it warm, try leaving the choke out.