Glad you asked...
To fix a gas leaf blower you must check the spark plug, fuel filter and any physical obstructions on the air intake. If you are trying to repair an electric leaf blower, keep in mind, electronics should be left to specialists. It would probably be cheaper just to purchase a new one. For more information look here: Choosing and repairing leaf blowers. http://www.thisoldhouse.com/toh/article/...,,490154,00.html;

