Seems the motor will crank strong and run when on muffs. When he gets out and motor is in lake, motor struggles to crank and will not start. Has tried new battery but same results. Battery had been moved to front of boat with extended cable. He is in the process of relocating to the back of the boat. With that said, not sure why it will crank strong out of water, but weak when motor is in water. Any thoughts appreciated.