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Update -

Changed back to the old plugs. No difference.

Several of my boater buddies who work on their engines can't help since it is a late model fuel injected engine and not the straight forward 2 stroke carborated engines.

Will drain the fuel line/engine filter and hook up to a portable tank of fresh gas today. While I am very skeptical it is a fuel qualilty issue, it is the only thing left I can do with my limited skills.

:(