You have to ask<span style="font-style: italic">what problems</span>? "Marine" Stabil isn't a lot different than regular stabil, it's just more concentrated. Both are designed to prevent gum, varnish, and corrosion that can be effects of old fuel and moisture attracted by the ethanol. It doesn't alter, convert, or remove the ethanol - it's still going through the fuel system, so if you've got ethanol-sensitive parts they're still going to be exposed to the ethanol. It might help but it isn't a cure-all.
An afterthought: some aluminum engine parts are prone to corrosion due to direct contact with the ethanol and not moisture (apparently). Some people have had a lot of success warding off or at least lessening the effects of ethanol by adding seafoam and/or marvel mystery oil to their fuel.