I bought a used powerhead that will arrive today. I still plan to re-build mine but this will get me on the water this weekend (I HOPE!) without rushing through the re-build and regretting it. I'll sell one of the two after I rebuild mine.
After taking my motor to a few "experts" the consensus is the failure was not due to oil but due to a lean condition in the top cyl causing detonation/pre-ignition and internal overheat. No signs of water pump or cooling system failure.
I'm going to start running high octane fuel and non-Wal-Mart oil for cheap insurance.
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