Have some questions have an old boat about 3 feet long grandsons great granpa built guessing 40 to 50 years old put new motors servo esc everything seems to work except wont run more than 10 sec shuts off got the brushed motors to turn different ways for the props 1 battery powers both seems to be plenty of power there just can't see why wont stay running when shuts down just turn off and on runs again any body think of something?