Guys I need all your help please, Etech 250 HO problems

Okay guys here it is I hope you can help me or steer me in the right direction. I have a 250 etech HO 09. The problem started out when we would run the live wells during a tournament the boat would go into power down mode while running and when hooked up to the computer would say it wasn't getting enough power from the battery. Well took it to the shop they swapped batteries said that our battery had a loose post. Took it out and it did the same thing, run the live wells for any significant time and it goes into power reduction mode while running the boat. Back to the shop they worked and worked on it. This was sport boat USA in Ozark MO. They were great to deal with and I know they tried to get it fixed but the mechanic said he just couldn't get it figured out even after being on the phone with evinrude. So took it to Bills marine in Monett MO, they have a great reputation and have been working hard on the boat. They said it was showing that all the coils were bad and said it was a computer problem. Sent the computer to evinrude to be reprogrammed. Got the computer back and it wont fire at all tested another computer in it and same thing wont fire. They had an evinrude tech come in to look at it yesterday and they said he couldn't figure out what was going on. That is very discouraging to me as the boat has been in the shop for about 2 months now and the different mechanic shops. I think they are looking at the magnetic wheel now? I don't know Im not a boat mechanic but am not happy as we had to pull out of our tournament circuit and miss the championship. Please guys I wan't my boat back and would appreciate if you could offer any assistance. I appreciate the mechanics at Bills Marine In monett Mo I know they are working hard. Here is the Mod # E250DHLSCS serial # 05217275. Thanks so much guys I will appreciate you taking time to look at my motor.

Move your pumps etc to one of the troller batteries. Leave ONLY the console gauges and motor power to the cranking battery and see what happens.

They tried that and it didn't make a difference. The whole time it shows that I am getting at least 14 volts to the motor. They just replaced the computer again said the motor is firing again. Evinrude said they made a mistake by sending the wrong computer ? Hope the livewell thing is ironed out

OK, your livewell pumps are not hooked to the cranking battery? AS far as you know?

Knock sensor?? Happens after powerpole installs ,just the vibration,sets motor into limp home mode.Just a thought.

Had a similar problem and was told it was the SI Transducer, it could be the ladder or power pole, anything that the knock sensor can pick up.

what do they do about the knock sensor picking up your ladder or power pole or transducer?

Install a new MAP.

They put a tie strap on my ladder.