Tim Miller here again, I was wondering if the electronic ignition module could be going bad which in turn is getting hot which could be making the motor shut off at the 4 minute mark. I had bought a new marine 4 barrel Holley carburetor a couple months ago, and when I installed it the boat ran well, however the last few times I started it the boat will only run for a short time before shutting off. I know that the carburetor didn't have an angled mounting plate on before, so I'm not thinking that that could be the issue. Because the carb. does sit at a pretty good angle. Please help me with any insight that you may have. Tim in Tampa