I'd run the gas through as much as possible (a 180 should have a fairly small tank), change the fuel filter and fresh go-juice. Given the boat is that new, probably not anything too complicated. If it still does the same after, then have the dealer look at the fuel pump, and go from there. I've never had issues with ethanol/water absorbsion (knock on wood) and most of our gas in Mo contains ethanol, and I do store with a full tank to minimize air/condensation during storage. For the record, I do change the fuel filter every year. Fiberglass tanks all but require it.
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Walt B
"Debt-Charged"Black '07 H210SS6.2L Bravo One turning a 21P HIFive
Wakeboard Tower with Perfect Pass Stargazer version
Missouri River; Kansas City, Mo.