Center Console Boats And More

Boat motor runs good then starts overcharging then dies……please help?

I need help but dont have much info. A friend of mine has an outboard motor, dont know the make or model
right now. here is his problem. It is a pontoon, the motor starts and runs good for awhile then after awhile the
voltage meter goes crazy as if it is overcharging then starts beeping then the motor dies. He says that it will
start back up and run for awhile then goes through the same problems. Could you give me any advice go give him
or even where to start touble shooting the problem. thank you very much for your time.