Last outing last year, gassed up on the lake, then maybe a 15 minute ride back to dock (weather suddenly spoiled the day). We putted around (5 MPH type of thing) for a while. When I throttled up, motor bogged after 25 MPH. I'm wondering if my 325 HP, which has always consumed regular grade fuel, coughed at the premium fuel. Marina dude explained that he had to switch to premium, as he only has one pump and so many boats require premium.

The shop didn't know what to think of my posing the octane question and intend on throwing some maintenance items at it (plugs, etc). 225 hours.

Comments appreciated. The boat is out of province and I have to lick this quick so as not to spoil the up coming vacay.