Helping a student get his outboard up and running. Model is 115TLRZ. He's getting a no oil alarm even with the tank full and then the motor goes into slow mode and won't go over 2000 rpm. I replaced the 30amp fuse and fuse holder since when he started the motor and let it run for a minute it was too hot to touch. Unplugged the sensor wires on the head and hooked the black and grey wire together, constant alarm after that. Looked at the thermostats to make sure they moved freely and they did. He had the carbs rebuilt last summer so I didn't tear into them. I'm guessing it's a sensor or wiring issue but not sure where to start. Just trying to help this kid get on the water for as little cost to him as possible. Thanks for any help guys