Craftsman zero turn zt7000 107.27774 22hp 50"

Three problems: can find how it charges the battery, two: you have to hold key to start for a little while until it warms up then it will run on it's own. Then engaging blades it turns into a kill switch. When holding the key to start I had to disconnect the solenoid so the stater will not stay ingauge. I don't see they way to charge the battery.