I replaced the coil in my 116 lawn tractor. Since then, I have to put the battery on the charger after each 3 cuttings of the lawn. It appears that the coil is no longer charging the battery, and I do run at full throttle (hydro). Evidently I am running it solely on battery power, but one time I shut off the mower deck but the engine was still running. When I went to engage the mower, the electric switch would not work till I put it back on the charger. Is there some adjustment I can make that it will start to charge the battery? Wayne