3.0 mercruiser suddenly dies

[eringgold84]

Ok. I have a 1983 chris craft scorpion with a 3.0 merc and i just recently put in new plugs, wires, cap and rotor, points and condenser, and new coil. Fixed a few loose wires. Had it out about 2 months ago and boat ran awesome all day. Took it out today and started fine and started to throttle up and it died leaving me stranded on the water. Let it cool down and it started back up and headed to the dock to trailer it. It died again. Finally got it on the trailer and replaced the coil once agian. Still same problem now it wont even stay started very long. It just dies suddenly. When i try to start it after it dies it sounds like it isnt getting very much power from the battery. The battery is a brand new agm battery with 1150 cca and i got it just 3 months ago. Please help!