[CT_V-20]

You're probably right Schicks. Sounds/looks like you guys know a lot more about motors than me. I was thinking of these lines from the article when I was reading your post: "Ethanol is a solvent and attracts water. These two properties can lead to clogged filters, inadequate lubrication in two-strokes, and low octane conditions that can damage engines. " And, "Above all, pay more attention to your engine(s) this season. Pay attention to a knocking or rough running engine, signs that your gas may have separated. If it has, the tank must be drained or you risk considerable engine damage."

According to the article the low octane causes the knocking and the inadequate lubrication can cause internal engine problems like scoring.

Like boat engines need another reason to create problems!!! >:( Good luck.