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Begin Heading home from a day of fishing off shore. As the boat starts to plane I thought I hit a lobster pot and got the rope in my prop, lost power. I shut the boat off and checked the prop but surprised to see nothing tangled around the prop. Tried to restart but just sputtered and died. Then it would not start at all. Compression checked out but no spark on any cyl. I tested my spark tester on the lawn mower to make sure it was working. Tested the CPS, CPS harness, ECU purple wire had 11.8 V. Did not check the coils because not likely they all turned bad. All done according to repair manual. This points to the ignition ECM. Any further checks, advice or help testing the ECM appreciated.