I'm looking for ideas on a no start situation. I have had this engine in a osprey boat for 3 years. It has never run problem free for more than a few days. I have replaced most electrical components. I recently replaced the ecm got it going ran fine on a test run. Next morning started up fine. Shut down came back and wouldnt start. I have been down the indmar trouble shooting list multiple times over the past summer. There are no codes registered, the fuel pump primes with proper pressure but no start. I have had a recurring problem with the pedal position and etc body codes. I have 2 carbs and have swapped them, used multiple different connections even at one time soldering the wires to the throttle body. there seems to be fuel, but the ecm is not sending a signal to fire? I seem to be getting good rpm on crank. I have checked crank sensor and have voltage at the camshaft sensor etc.....any ideas