I have a yard machine riding mower, looks great,I put a new battery in it worked finebut now the mower only works it you jump strated my thought,where would I find the voltage regular????????? help

How old is the battery? When you get it started put a digital volt meter across the battery terminals and with the throttle about 1/2 open check the voltage. If should be over 13 volts DC if your charging system is working ok. If it is over 13 volts your battery has probably just given up. Lawn mower batteries are only good for 2-3 years. A trickle charger can extend the life if used.

I hope this helps.