I have a new Bennington 20' pontoon w/ 90 HP Merc 4-stroke. The boat steers extremely hard to the left, if I let go of the wheel the boat pulls hard to the right. Standing behind the engine the trailing edge of the trim tab is adjusted to the left. Is the trim tab adjusted to the wrong side? Dealer is long way from where I am, hasn't been much help by phone. Any help would be appreciated.