OK, first thing is check the connections, including the ground system. After checking and cleaning them check the voltage at the battery as it sits. Then, start the mower with whatever means needed (jump, charge, etc.). Then, re-check the voltage. It should be higher than it was at the beginning. If not, the problem is with the charging system.
Here is a great charging system publication from Briggs and Stratton. It was posted here by one of our moderators, Mark, to help another gent with a similar problem. This should help you get to the bottom of the problem in short order.
http://www.mylawnmowerforum.com/forum/2961-post13.html
Do keep us informed and let us know how it progresses.
Here is a great charging system publication from Briggs and Stratton. It was posted here by one of our moderators, Mark, to help another gent with a similar problem. This should help you get to the bottom of the problem in short order.
http://www.mylawnmowerforum.com/forum/2961-post13.html
Do keep us informed and let us know how it progresses.